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Pros: It works!
Got it cheaper than the current price.
Comes with adapter.
Overall Review: I ordered one of these in late October as soon as I got my Surface and doubled the onboard storage. I've been using it daily since then with zero problems.
Pros: Fast Random write performance (crucial for apps), sequential read, and sequential write performance. Using this card in a USB 3.0 reader connected to a USB 3.0 port, others have achieved 44 MB/s sequential read!
Cons: Only a slight con, but this card costs about 50% more than plain class 10 microSD. However, it is cheaper than the Samsung class 10 microSD, which performs similarly mobile app wise
Overall Review: USB 2.0 reader connected to USB 3.0 port.
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Sequential Read : 18.372 MB/s
Sequential Write : 13.057 MB/s
Random Read 512KB : 18.703 MB/s
Random Write 512KB : 8.554 MB/s
Random Read 4KB (QD=1) : 3.150 MB/s [ 769.0 IOPS]
Random Write 4KB (QD=1) : 1.957 MB/s [ 477.8 IOPS]
Random Read 4KB (QD=32) : 3.590 MB/s [ 876.4 IOPS]
Random Write 4KB (QD=32) : 1.960 MB/s [ 478.5 IOPS]
Test : 50 MB [D: 0.0% (0.0/29.7 GB)] (x5)
Cons: corrupts quickly, like within a month.
Warranty is worthless, I contacted Sandisk, they asked me how I defined corrupted. I define corruption as cannot format or use. Apparently they are still looking up the definition.
Overall Review: I use my sd card for lots of files on my phone. I work on the field and use the storage for files back and forth from the office. As well as photos to send to the office. I was surprised how quickly this sd card corrupted, in fact I was surprised it corrupted. I have an old 32gb card class 3, I have been using for over 3 years with no issue.
Cons: I ordered two Sandisk SDSDQUA-064G-A11A cards but received two SDSDQUA-064G-U46A cards. A11A are cards for the American market whereas U46A is a cheaper international market card limited to international tech support and warranty service despite paying for US support and service.
Sandisk will only certify the A11A as compatible with the model phone that my husband and I each have Sony Xperia Z Ultra (C6806) and even for international variations such as C6802 and C6833.
I read conflicting reports about U46A not having the same speed as A11A, class 6 for U46A vs class 10 for A11A. There is nothing I could find straight from Sandisk other than the public bulletin board on their site about this issue.
If you aren't wise enough for desperation reasons or otherwise not to buy from SoCalTrade, at least have the wisdom to look at the model number on top of the UPC bar on the package prior to opening it.
Pros: I rated this card only 4 stars because I just received it and cannot comment on its reliability. However, I've tested it and the speed is top notch (see other thoughts.) I'm using it in my Galaxy S3 and no issues so far. From my research, only the Samsung card matches this card in random write/read. This is important if you're running apps or op systems on your device or pc. If you're just looking for storage then buy a cheaper class 6/8/10. Also popped the card (with the included adapter) in my Panasonic GH1 and it has no problem keeping up in the recording of HD video.
Cons: none as of yet
Overall Review: Tested w/CrystalDiskMark Win 7 Ultimate using a generic usb adapter on USB 2.0
Sequential Read : 18.098 MB/s
Sequential Write : 13.492 MB/s
Random Read 512KB : 18.446 MB/s
Random Write 512KB : 11.621 MB/s
Random Read 4KB (QD=1) : 3.676 MB/s
Random Write 4KB (QD=1) : 1.452 MB/s
Random Read 4KB (QD=32) : 3.433 MB/s
Random Write 4KB (QD=32) : 1.312 MB/s
Pros: Fast and Huge. When it works.
Cons: SD Card unexpectedly removed error.
Overall Review: I Purchased this card to go with my new Galaxy s4 in may. Card was decently quick, and had a lot of space for a great price. However, if you do a quick search for "SD card unexpectedly removed" error. You will quickly learn that there is a huge problem with these cards. So much so that there was a silent recall on them. This recall should have been sent to resellers like newegg so it could be passed on to customers with details on how to get a new card that has been manufactured after they fixed the problem. However it wasn't passed on. Leaving many users to spam internet forums with questions on how to fix the error. The only surefire fix being; Send it back, and get a new one. I have already contacted SanDisk Customer support, and am waiting for my RMA. It is a shame though. Costumers who are likely to be impacted by such wide-spread errors should be contacted by the manufacturer, not the other way around. The units being shipped now may very well in fact be fixed. But be advised that is you get the "sd card unexpectedly removed" error. Don't waste your time trying to fix it. Send it back for a replacement.
Pros: High Capacity
Fast real-world performance speeds
Comes pre-formatted out the box in exFAT format which avoids the file-size limitation of FAT32 and offers maximum compatibility with most operating systems and devices.
Cons: Poor manufacturing process
Prone to file system corruption requiring reformat
Prone to complete device failure.
Overall Review: Several months ago, I wrote a review stating that I rated this was an impeccable product. That sentiment has since changed.
I indeed did purchase two of these. I have found that they are prone to failure and are significantly flawed devices. They also provide no indication of their impending failure until you realize they cannot be written to or the file system becomes corrupt.
I have found that this entire series of cards is subject to failure, especially granted the practically 100% failure rate of these seen by myself and others who own them. This is not a small sample size of 5-10 cards; I, myself, have seen no less than 20 of these fail between myself and my colleagues.
Combined with the sheer volume of reports related to the failure of these devices, I am forced to question the QC process of these cards and would advise people avoid them in favor of smaller capacity cards. I cannot speak to Team's 64 GB card due to lack of knowledge with relation to their performance.
Pros: * Came with a mini usb card reader (unexpected)
* Class 10 speeds (more under other thoughts)
For people who say this is not as advertised, you have to read what you are buying. The packaging clearly says "up to" 30 MB/s" and never guaranteed it. Sequential read and write speeds are good enough for the Class 10. I bought this for my new Galaxy S3.
Cons: * Expensive compared to other micro sd's, regardless of UHS speed
* Sandisk in general is more expensive than other brands
* Was kind of a let down to see these type of results, but speeds are as "advertised"
For a UHS, I would think it'd be faster.
Even on Galaxy S3, it showed similar speeds: see Other thoughts.
Overall Review: *CrystalDiskMark 3.0.1 Test*
Average sequential read speed: 21.5 MB/s
Average sequential write speed: 11.7 MB/s
Average random read 512KB: 21.1 MB/s
Average random write 512KB: 5.3 MB/s
I averaged this result with a total of 4 tests: Using USB Card Reader and With SD Card Adapter for both 50MB and 1GB. I've verified this by moving files myself from and to this card. A 701 MB file took a minute to transfer to and 30 seconds from the card. On the Galaxy S3 with Antutu Benchmark:
SD card write: 14.2 MB/s (142 (score)) and SD card read: 21.0 MB/s (190).