Side by Side Comparison of: SanDisk

We bought these to use in our camera and they both worked exactly as intended. Buying a two-pack allowed us to keep two separate events apart from one another without the photos running together, so that was super convenient. 16GB really is a pretty good amount of storage for us. I hesitate to buy larger storage cards in the event they are lost or damaged. I'd rather lose 16GB worth of data than 64GB etc., but that's just me, a personal decision.

I bought this to accompany the ViewSonic VFD820-50 8-Inch Digital Photo Frame. I can't tell you how many photos it will hold because that depends on the size of each photo, all I can say is that I saved over 30 to it at about 200 KB and didn't run out of room. The price was great and the packaging was well protected and arrived quickly.

Amazon is amazing I have a 2gb sd card that came with my nintendo 3ds. I am planning on playing pokemon sun and with the demo and full game the data would be more than 2 gb. I bought a 32 gb sdhc card from amazon and I was able to transfer my data over to it. I tested it on my nintendo 3ds all my progress is still there. It is perfect, now to be honest I should have upgraded to a sd card that had more space long ago because of all the game I play. I am glad I did it, so I can enjoy pokemon sun and other 3ds games that I buy a hard or digital copy of.

I tried a micro with adapter and that didn't work. I'm using it in my MacBook Air with solid state drive to increase my overall storage. I was able to move a lot of files here that were cluttering my Mac but I didn't want to necessarily delete them. My Mac just sees this as another drive and I can now put items on it that I may not need now but would like to hang on to if necessary. So, for that it works perfectly and writes fast.

I bought this directly from Amazon (not from a third party seller), and when I received it, the sticker was different than all my other SanDisk memory cards I own and have bought over the years from a physical store like Best Buy and Frys, and there weren't the usual printed numbers and whatnot on the actual plastic housing, so at first I thought maybe it was a counterfeit memory card. So I did what I knew best, I went directly to the SanDisk's website chat (I did not know they had this feature on their website, whaddaya know!), and they asked for my card number, sent the person I was chatting with a photo of the front and back of the memory card, and they had me waiting for a couple of minutes and they returned and verified that it was an authentic SanDisk memory card. Of course it works just perfectly and nothing is wrong with it, but it was good to know for sure that it was a legit card. The only thing that bugs the OCD side of me is that this SanDisk memory card looks different from all my other ones. But it was a great buy for a great price.

Great authentic product! Sadly I had to return it as my VW memory card slot doesn't support SDXC (SDHC is it's max) but would buy again from seller. Returned it on my own dime a week ago to avoid the $$ of a UPS prepaid label for such a small item, hope the refund/return works out. I wish I hadn't. My mother bought 2 of these today as extra photo storage space for he laptop and husbands tablet. Cheapest fast memory you can buy and SanDisk is the gold standard for SD cards.

Pretty fast read! 99 MB/s Read - 59.79 MB/s Write on my system, using CrystalDiskMark 5.1.2 (x64) on Win 7 and a Kingston MobileLite G4 USB 3.0 Card Reader (FCR-MLG4)Lifetime Warranty on cardFully recyclable packagingTested with:ATTO v2.47CrystalDiskMark 5.1.2 (x64)h2testw v1.4HD Tach v3.0.4.0

I purchased the 128GB version of this card hoping that it would work with my Panasonic 991 4k camcorder. I have gone through a few cards that advertised extreme speeds but when you look into them further they did not have sustained write speeds that could meet the demands of 4k recording. I am happy to report that this card really does work well for 4k video. It is class 10 and U3 which means it meets the minimum requirements for most consumer 4k recording devices. The price was also very reasonable and actually was less than the 64gb versions of other similar speed cards.*** Positive Points: ***- Able to record 4k video- Good Price- Lifetime warranty*** Negative Points: ***- None

Great capacity and performance. For my full frame DSLR, large RAW files write quick enough to avoid filling up the small in camera memory buffer when taking high speed sports photos. Got this at a great price on a lightning deal and came with promo code for free Shutterfly photobook.

As a full-time wedding and portrait photographer, SanDisk is the #1 trusted memory card manufacturer on the market. Okay...#1 is completely my opinion but I have used nothing but SanDisk. I have had ZERO corruptions/failures and even accidentally washed one in the laundry while vacationing!!! And if you're asking why so many cards, I shoot with two Nikon D800's and their files sizes are ridiculously AWESOME!!! Haha

I recently got really interested in photography and video. I purchased the Lumix G7 mirrorless DSLR camera. I needed an SDHC card that would allow me to shoot 4k and take fast burst photos.Do I need to spend another arm & leg to allow myself to record in the beauty which is 4k? NAY. Get this to solve your worries, child. Best bang for your buck.So. While reading reviews for Micro SD cards on Amazon, I was surprised by how many "fake" cards were reported. Apparently it's a big deal and has made it's way even to Amazon. So be careful with that. I found no indication of this being fake, thankfully.Performance:Most important. Does it work without hiccup? When shooting 4k video (100mbps), I have no issues issues. Camera doesn't suddenly turn off like other less powerful cards might. It's also recognized. Other owners of the G7 have complained that non U3 cards weren't recognized. I got the U3 for piece of mind knowing that it would handle whatever I threw at it. It does!Value:For the price and performance, this is an excellent product and offers great value. For a class 10 U3 card, I think this was the best bang for your buck. I've had great experience with SanDisk in the past. They continue to offer products which work well. SD cards continue to fall in price. The price difference between the high end card like this and some other mid to low level card is minimal. Might as well get this even if you don't plan to shoot 4k.Summary:Overall, I'd highly recommend this card. If you ever plan on shooting 2k or 4k or high burst photos, you'll most likely need a card of these specs. Sure lower end cards might work, but they're not guaranteed to keep up. This is good for future proofing. Those higher formats are quickly becoming the norm. You don't want to be stuck with a card that can't shoot at those qualities. You'll end up having to buy this in the future, might as well get this now.I'm satisfied with my purchase and haven't had any issues. Provides me with the capacity and speeds to shoot at 4k. This is probably the best value card which can do that. The price difference to upgrade to this is minimal. Just go with this one!Hope this helps

At first I was excited to find such an inexpensive option that is capable of 90MB/s write speed. But then after reading the first part of the product description I discovered that these are only capable of up to 60MB/s write speed. Well, 60MB/s is still great at this price point so I ordered two!Well, the cards arrived today, so I decided to test one of them. I tested the card and found that it is writing at less than 50MB/s. So, I looked a little more carefully at the product information and see that only the 128GB and 256GB versions of the card operate at up to 60MB/s; the smaller cards are 40MB/s. It's very frustrating to have cards advertised as 90MB/s, and then find out in the fine print that the write speed (the most important speed for taking lots of photos with a high megapixel DSLR in RAW) is half that speed. So, minus one star for irritating advertising.Edit: The listing has changed to clearly indicate the write speed now, so I'm giving the star back. :)

Bought this to use with my camera,a fuji finepix, while I was on vacation. I kept getting a card error signal in my camera. So I returned it and they sent me another one right away, but i got the same error message. I compared it to my other sd cards and this has a different code than my others. So I did try it in my canon camcorder and it worked fine so I will use it for that. Check with your manual for the correct sd card code to see if this will work with it.

Had it since April and it still works. Just a note of advice: remove the SD card from the camera BEFORE the battery, or you could accidentally lose files. Aside from that, works great. c:

I feel like these cards are overpriced for this day in age. San Disk cards are always a good buy when you need storage as they are quick and reliable, but since they have been out so long you would think they would have found a way to make them more affordable? I did not get the easy open package, but I did not have trouble opening the manufacture package. It tore open without scissors or any other help. I use mine in my laptop and computer i have had so many computers break it is nice to know my important photos and things are stored on a card like this.

Good qualityThis product was a personal purchase for myself at the normal retail price. I am reviewing it solely because I want to share my experience with other potential customers. I have received no compensation for my review nor do I have any relationship with the seller or manufacturer of this product.

Here is the only reason that I am giving it 4 stars. I do not like the lock slider on the side of the SD card. This might be helpful to a lot of other people for many reasons, but I can say for me, that it hinders my experience. The main reason is that I am a hunter, and use these SD cards for trail cameras, and if someone wants to mess with my camera, they can either steal (which obviously the product can't prevent) or lock my SD card. Not to mention I have accidentally locked one myself and lost 2 weeks worth of pictures because the camera couldn't operate while locked. Hope this helps! Other then that, fantastic product!

These cards are class 4 (2.0 spec), which are slow compared to class 6 & 10, but cheaper & class 4 might be all you need. Many cameras can record video in 720p & 1080p HD with no hiccups using these class 4 cards. (source: wikipedia). However: some of the newer cameras require the higher speeds, so if you have a newer camera & are unsure of whether or not it will accept a class 4, you should get at least a class 6. For most devices a class 4 will work fine, is adequate, & dirt cheap. For newer devices get class 6 or higher.

I'm so glad I get these for my Canon PowerShot. They're waterproof, shatterproof, drop-proof, weatherproof. I'm also so glad these are on the market. I hope that when something actually happens, they'll pull through and do what they're made for: to survive.

I bought this for music in my car. I've noticed some songs don't work anymore after the disk was exposed to high temperatures in the summer. I haven't tired to reload the songs from a computer though

My wife is a YouTube vlogger and content creator. She always complains how long it takes to transfer her videos from the SD cards to her Mac. I looked at her SD cards and saw she had been buying 40 MB/s cards.I gave her a quick explanation of data transfer speeds and her eyes glazed over. So I just bought this card for her instead. The cards work great, but my wife hasn't noticed any improvement in the length of time it takes to transfer video to her computer. I haven't benchmarked it to be sure, but I would expect at least a somewhat noticeable difference when going from a 40 MB/s card to a 90 MB/s card, especially on a high end Mac.If you're looking for a reliable card at a fair price from a reliable brand, this card is great. If you really need bleeding fast speed of go with one of the Pro versions, even if they are a bit more.

This is a lot of memory for a great price by a company I trust. All very good things. There are limitations on how I can use that memory that I did not anticipate.My laptop has 100 Gig hard drive that is 63% filled with programs. I was down to 6 Gig of unused space....very tight indeed. So my thought was to move my data to this very large SD card and access it there instead of drive C. Well, it won't back up from there and files don't want to save there. So, I moved a modest amount of my data back to drive C and use the SD card to back up this data. The rest of my data files are not needed on a frequent basis so I left them on the SD card. My Cloud backup will only back up hard drives. So it will NOT back up the SD card. I do have this same relatively inactive data on another 128 Gig memory stick.

The card is as advertised, however please read carefully before buying. The write speed is 40 MB/s and only read speed is 90 MB /s unfortunately this was not displayed as vividly as the write speed and I fell for this. Buy the pro version as now the difference in price is also just a couple of $. Its a good product but they should not take advantage of such labelling.

Intro note: You probably don't need this card if you're just an amateur/casual photographer or if you need it for a handheld device, such as a Nintendo 3DS. I would just get something cheaper.I don't usually write reviews because I get too lazy, but because this is a new card and there aren't any reviews, I thought I'd pitch in. Some background info about me--I'm an intermediate photographer/videographer that mainly shoots 1080p/24fps and 1080p/60fps video using a Canon 70D, so I can't give real life feedback on 4k shooting(sorry), but I will include average scores(that include 4K) from the Crystal Disk benchmarks that I've ran.DSLR usage- The card writes very fast so that pictures practically show up immediately after being taken on the LCD screen. Also, browsing quickly through the gallery of photos cause nearly no delay for the picture to show up.- The card can keep up amazingly with continuous shooting. As you may now, the Canon 70D has a pretty good continuous shooting rate that doesn't slow down unless you're shooting in raw. However, most of my sd cards will down after the ~40th shot or so, and the camera is forced to take pictures at a slower rate until the card "refreshes" and is back up to speed. Not the case with this card. It held up beautifully and the camera hit its buffer when it was supposed and not any sooner. This is good news for action/wildlife/sports photographers.Computer usage- I recommend you take a close look at the benchmark scores below. Read/write speeds are true to Sandisk's claims of 90 and 40 Mbps respectively, however, it is sometimes a little lower or higher. Transferring 20 gigabytes of photos/videos is a breeze, but obviously it won't be twenty seconds--let's be real with our expectations here, this isn't an SSD. Unfortunately, like other cards, it runs at advertised speed for about twenty seconds, and then it dips to half of that for three or four seconds, and then it's back to 90 mbps. The same is true for writing speeds. I believe this is due to the card hitting its buffer zone, similar to what a camera on continuous shooting mode would do. If I am mistaken on that, please correct me.-The benchmark rated the read/write a few mbps higher than what Sandisk claims, but I find that it's usually smack dab on 90/40.Overall, I really recommend this card for the intermediate camera users and above, although I'm sure a serious professional would use something better, especially those that are doing serious video editing and need a speedy read/write from their SD cards. Again, if you're just starting out in photography, this card is unnecessary, but if you can afford it then why not.**Benchmarks:-----------------------------------------------------------------------CrystalDiskMark 5.0.2 x64 (C) 2007-2015 hiyohiyo Crystal Dew World : http://crystalmark.info/-----------------------------------------------------------------------* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]* KB = 1000 bytes, KiB = 1024 bytes Sequential Read (Q= 32,T= 1) : 93.330 MB/s Sequential Write (Q= 32,T= 1) : 49.148 MB/s Random Read 4KiB (Q= 32,T= 1) : 9.934 MB/s [ 2425.3 IOPS] Random Write 4KiB (Q= 32,T= 1) : 4.057 MB/s [ 990.5 IOPS] Sequential Read (T= 1) : 95.617 MB/s Sequential Write (T= 1) : 48.860 MB/s Random Read 4KiB (Q= 1,T= 1) : 9.425 MB/s [ 2301.0 IOPS] Random Write 4KiB (Q= 1,T= 1) : 4.097 MB/s [ 1000.2 IOPS] Test : 1024 MiB [F: 0.0% (0.0/29.7 GiB)] (x5) [Interval=5 sec] Date : 2015/09/10 17:34:01 OS : Windows 10 Professional [10.0 Build 10240] (x64)

I mean It's an sd card.. for shooting in raw on my canon this is so slow... it takes forever to process them. so for me it doesn't work because I am doing photo shoots and need to be able to review pictures quickly and this takes too long to load them

This card was recommended for use with a Film to Digital Convert I purchased, and made the Converter freeze. Only because the Converter could not accept it. User Manual with Converter states such, but Amazon recommended this card to purchase with the converter. Now I have a perfectly fine memory card without a slot to use it in. I'm sure I'll find a use for it someplace.

Extremely slow with my Canon 80D DSLR — I often have to wait for 20 or 30 seconds after taking pictures to be able to look at them! Granted, I am using raw, so they are about 30 MB each… So this card is probably fine if you're just shooting JPEG's, it avoid for RAW.

I had purchased this flash memory card to make an emergency boot disk for my MacBook Pro. The application, 'Disk Maker X' did not recognize this SDXC card. OK, I'll use the application, 'Techtool Pro' to make a recovery/repair boot volume... This card "worked", but the speed of the interface was w a y t o o s l o w . I should have spent a couple of extra bucks on a USB flash drive instead. This card will be regulated to the camera bag.

The quality of this card is relative to how you plan on using it. I bought it last year to use in my point and shoot digital camera (12MP) while on vacation and it worked perfectly. No, a year later, I've bought a DSLR and found it just wasn't up to snuff. My DSLR (26MP) creates files of too large a size for this card to quickly save. Want to take one picture? Fine, but be prepared to wait 20+ seconds for it to be fully saved onto the card, during which time you will be unable to take any other photos. Want to shoot in burst mode? Forget about it; it's not going to work.What I had been unaware of when I first bought this card is that memory cards have speed ratings which indicate how quickly they can process the data you want to write on them. To further complicate things, there are two types of ratings, Speed Class and Ultra High Speed. Speed classes come in four ratings, C2, C4, C6, and C10, which means they can write data at a rate of 2MB/s, 4MB/s, 6MB/s, and 10MB/s, respectively, or UHS comes in UHS U1 and U3, which writes at speeds of 10MB/s and 30MB/s. The higher the MB/s, the better the card.This card writes at a C4 speed (as indicated by the number 4 encircled by a C on the label). It's a decent speed for smaller files, but considering a RAW photo files can be rather large, if you're shooting high res, RAW files, this is not the card for you. It will absolutely freeze up your camera.If you are interested in an SD card for a DSLR, look at something like the Lexar Professional 600x 32GB SDHC UHS-I Flash Memory Card LSD32GCRBNA600. Since switching to the C10/U1 Lexar, I've been infinitely more happy with my camera. The Sandisk C4 32GB remains in my point and shoot, where it's better suited.

I have been using SanDisk cards in my DSLR Canon Rebel for the past three years and have found them to be reliable as far as recording pictures and sound. They are versatile in that it is easy to transfer data to and from them when inserted into my laptop computer. I use them largely for pictures and movies I take with my DSLR (digital single lens reflex camera).ProsCompactLightweightConvenientSmallReliableConsYou don't get 32gb of memory, you get 29.7gb of memory according to my computer. What the rest of the 2.3gb are used for, I cannot say, but that is what you get.Video is usually recorded in MVI format (Apple supported), which is more the fault of cameras like Canon, Nikon and others. So you have to convert the video to MPEG format if you wish to edit it using Windows software (requires a separate program). MVI files are also about four times the size as MOV files or MPEG files are.Transfers are slow for movies but almost instantaneous for pictures. Movie transfers usually take several minutes.These little cards are quite fragile. I recommend handling them with great care. Rough handling, such as "shoving" a card into a slot because you're in a hurry can damage the ultra-thin copper connectors. Dropping and accidental strikes can result in an useable chip and there goes your money. Keep them in their little plastic cases when not in use. Insert them slowly into their slots. Prepare before you take your picture. Be ready to shoot, even for spontaneous pictures.If you slide the little plastic tab on the side, it will render the chip "permanent" until you slide it back into the top position. This makes it impossible to transfer memory away from the chip but allows you the ability to make pictures at your local kiosk such as a Target or Walmart or Walgreens that have such kiosks that accept disks. Once you slide it back, you can transfer data to and from your computer.

went bad two weeks after I had it .It literally fell into / Sepertated

We have these chips in all our chip equipment. Holds eveeything we want to do .. Video, pics, docs. Great storage/archive and retrieval is just as easy.

Lock slider is terrible. Takes me 10-15 tries to get the card into my camera without the lock sliding down. Eventually I just taped it in place. Stupid feature that has been around way too long. At least strengthen it!

These are all right for most things, but they do not do well in a D610 on continuous mode. I've missed some images because these cards couldn't keep up with the buffer on the camera. Also, one of these cards failed after only a few months of use; I expected better from sandisk.

Wrong size/format was ordered, make sure its the right one you need as we discovered we could not return for refund so stuck with these items.

I have always bought SanDisk SD cards. I now have four of them. I have an older version of this model- the Extreme 32GB 45MB/s. That has a capacity of 29.7GB, which makes sense because manufacturers define a gigabyte, or GB, as 1 billion bytes, which computers define a gigibyte, or GiB, as 1,024,000,000 bytes. However, when I received this card in the mail, the capacity showed 28.7GB. How could the capacity between the old card and the new card be a whole Gib?!I called SanDisk and basically got what I just described to you, the difference between the definitions of capacity, but nobody really answered my question about the difference of 1 GiB. I called back to get someone else, and eventually connected with a "Level 2 Technician." He explained it a little more clearly, and it seems the technology and firmware for achieving UHS-3 speeds (the older card I have is UHS-1) takes up more space. I don't know if that's a load of bull, but I found another review on Amazon for a SanDisk 32GB microSD Extreme card mentioning the same issue. This is really unfortunate. I know it's only a GiB, but that's good for a few hundred pictures.SanDisk offered to replace the card, but the tech said the capacity would be the same. Whatever. I've spent a long time digging to find if this is a problem with other cards, and I found one or two examples. It might just be something to do with the increased UHS-3 speeds.All in all, SanDisk makes great SD cards, but this experience left me thinking if I'll buy from them again. But what do they care? They're a corporate giant that won't notice if they lose a few customers.

I cannot get these to work in any of my devices. They're supposed to work in my cameras, but they won't work in either one. I'm not sure what these are meant for, or if they're defective, but they don't work in anything they're supposed to work in. Of all the memory cards I've ever boughten, these are the only ones rejected by every device. It's weird. SanDisk is a good brand, but this pair of cards is useless as near as I can tell for the average person.

Memory card had 3,000 pictures very hard to format the card!

Very slow, compared to my other SanDisk 32 GB cards and reported two error messages during a photo shoot. I was terrified the pictures would not save. Luckily, they did. I formatted the card before the shoot and it took a long time to format it to wipe it clean, after the shoot. I have never had an experience like this from my two other cards of the same company and stats.

Great concept. Very poor design/ application. You have to unscrew it to access the back panel which means taking it off. The UI Interface is buggy at best. It takes several minutes to access the Wi-Fi on the device. When you delete images through the web interface, it evidently does not delete them from the SD card. I bought one, hoping that it was going to be the next best thing, however it needs much much work. Unless they update the firmware and web interface to be more efficient and not take five minutes to download imagery, I will not buy another. It is actually faster to remove the SD card and download imagery the old-fashioned way then it is to use the web interface and wireless utility. It defeats the purpose. Come on Kodiak, you've got a great idea, you just need to package it much better. But it does work. That's about all I can say at this point

Well if U have the patience in waiting for things to copy, then you'll be fine. It rates at about 28gbs (Of actual Space) and copies files onto it at about 4mb a sec, maybe a little faster depending what mood it's in. Trying to copy something that's like 15 gbs onto it though lol...yeah you'll be waiting for at least a good hour. My net can download about 4x faster then what this can do, so yeah...that's pathetic. Been working fine for me otherwise. It's a Class 4 though, what do I expect right. If y'all want something faster, then get a better class version besides 4, the lower then number is, the better usually. Definitely not good to use as a installer for anything as it goes really slow. I don't understand how this thing can have all this memory, yet be SOOO slow, and trust me, it's not the PC haha. I've used this in a regular internal card reader and a USB one. Speed was the same. It didnt work on my friends MAC either. Not for sure what kind it is exactly but I had put a couple of things on it to transfer to his laptop, Popped it in the SD card slot, didnt want nothing to do with it. Didn't even pop up with errors or nothing. He has a 16gb Kingston he tired, worked perfectly, so it wasn't his port. As far as my experience with it though, I don't like it, WAAAAAYYYYYY to slow for my needing haha

I ordered 2 of these (2gb SanDisk-branded SD card), they arrived promptly, and did not function. So I shipped them back for a replacement. Two new cards also arrived promptly, and ALSO failed to work.- Attempting to copy files to the card results in a "disk not found" error.- I tried two different card readers, both of which work perfectly well with other SD cards.- I tried reformatting the cards -- this also failed, with a cryptic error message.- I tried toggling the lock switch -- which did nothing.Shipping these back for a refund.UPDATE -- I ordered a brand new SD card reader, and these cards work with it. They don't work with any reader more than a few years old. I don't know why.

still waiting for better speeds. Lags while recording and creates gaps.

I've had two of these die on me in six months.

I had a problem using this SD card on my computer. When inserted to my laptop, I can not view any of my images, it would also make a glitchy sound when being inserted. Also my other option was connecting it from my camera to my computer, when viewing the file of pics from my camera folder they were visible, but it still did not allow me to see my pictures as a bigger image. this is very inconvenient and I would like a replacement, never had such a problem just looking at pictures I've taken on my computer. Please send me a working SD card.

Lost data! Sucks, I had some nice videos on there too. Well, it could have been because of the adapter (https://www.amazon.com/Adapter-standard-Connector-Smartphones-Function/dp/B01BXSKPES/ref=sr_1_1?s=electronics&ie=UTF8&qid=1466599558&sr=1-1&keywords=Micro+USB+OTG+to+USB+2.0+Adapter%3B+SD%2FMicro+SD+Card+Reader+with+standard+USB+Male+%26+Micro+USB+Male+Connector+for+Smartphones%2FTablets+with+OTG+Function) - this one. But either way I lost some video which I wanted and that sucks.Was working fine last night. Woke up this morning, put it in the adapter and into the USB and it didn't read it at all. Restarted my computer and it read the card, but then all my videos were erased! So I put the card into my camera to see if it would work and it didn't. The pictures and videos were gone and the camera wasn't recording to the card. With the card in the camera it just stopped recording. The record function would turn on but it wouldn't actually write. The timer just stayed at zero. So I believe there's either a problem with the card itself or the adapter. I am writing negative reviews for both. Hopefully they'll let me get a replacement for free. Sucks.**UPDATE** Contacted sandisk and they won't replace the card. They even wanted me to pay for a recover system to recover my files. Am going to switch to Transcend because of the terrible runaround Sandisk gave me. Bad customer service.**UPDATE 2** Sandisk finally complied and told me to contact Amazon, they sent me a replacement out the next day which was nice.

I was very excited that the card at a reasonable price. I put it into my camera, Cannon SD 870IS. It did not work. It has a 'memory card error' message. I do not know if it is the defected card or it is not compatible with my camera. I returned to Amazon and got full refund. I love Amazon. I do not have to worry about if it did not work.I think the little 3 inside the U may represent something. I bought one without it. It works.

Receive error msg on this disc on both my cameras. First time that's happened. Maybe mine is defective. as this is usually great quality.

I wasted my money on this because I thought it was a regular SD card. It is not. It only works in devices compatible with SDXC. Has this happened to anyone else.

This doesn't work in my camera that is was supposed to be compatible in and now I went to return it and there is a no return policy. Guess I'll have to reach the descriptions more carefully. Bummer.

Didn't fit the electronics purchased for; returned but deeply sadden that I had to make a 30.4 mile trip to turn in to amazon station when there are several locker stations within a 5 miles radius of my house!

Dead on arrival. identical specs with other brands - SONY and TOSHIB- but this SANDISK was not recognized by my computer like the other brands were. . Now I'm trying to find out how to get a refund for this dud.

The was my first SD card purchase. I got it in the mail quickly. I put it in my new dashcam and everything was fine for a few days. Then it stopped being recognized. I put it in my laptop and it didn't work there either. So I returned it and got a replacement. The second one is working so far but I haven't had it very long. I hope it doesn't fail like the first one did at some point in the future.EDIT 1-1-2016: So the second SD card died on me. It worked for a few months then just stopped working one day. I took it out of the dashcam and put it in my laptop and it would not read. Now I am out of the Amazon return window so I am stuck with a useless SD card. I'm just glad I only had dashcam video on the card and not priceless family photos or something.

With the prices of SD cards now, purchasing anything under a class 10 card is a waste of money. Sure it will hold a lot of data BUT will the new technology you buy next year or the year after even support a class 4 card?Do yourself a favor and do a little research on SD card speed before you buy. TheI learned my lesson, I purchased this to use for a data logger for a Raspberry Pi project and it works fine but for 7 dollars more, I could be using a class 10 SD card for video work.

I am not sure whether I got a dud or whether this was just incompatible with my Nikon DSLR (model D5200). I tried using it a few times and the photo would take and show me a preview, but when I tried to review the photo subsequently it would say the file could not be read. I gave up on using it and considered it a waste of money until today when I tried once again and now it says the card is damaged. The card and files also do not appear when I connect my camera to a computer. All in all, a major bummer and I still need a new SD card ugh.

not sure if this a knock-off, storage of pictures on camera failed to unload all and some pictures were corrupted.

Failed after two months :(It failed just after two months of use, with a VERY IMPORTANT video of one of our interviews. Avoid it at all cost.

WATCH OUT for this one!!!! This card corrupted the second time I used it. Unfortunately it was a wedding ! ! ! ! ! !So ticked off about this San Disk!! ! ! ! ! !I have used San Disk cards for years and years and now this is also the second card that has corrupted in 2 months! Brand new cards!!!

Used it for the first time after having it for a month. Card could not be read. Data was unretreivable. I was outside of my 30 day return window. If you choose to buy this card test it immediately.

Very disappointed that there were corrupt files the very first time I ever used it. A complete nightmare! The picture preview on the back of my lcd showed pink people and sure enough when transferred onto my MacBook there were corrupt unreadable files!