Pros: Worked fine for 3 months, fast file transfers & easy to use
Cons: Only worked for 3 MONTHS!! DO NOT BUY!! Card worked for 3 months then crashed. I can not edit or delete any files on the card now. I also can not re-format the card because it is damaged. I have read online reviews about hundreds of customers having problems with the 64GB Sandisk microSD Card. Even Sandisk has acknowledge the problem with their 32gb and 64gb cards
Summary: 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.
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.
Summary: whenever I removed the battery from the phone, I would lose all the data on the SD card, even though the SD card was not touched. True disappointment. I had so much confidence in SanDisk products. Now I am using another SD Card, and it works flawlessly.
Pros: i got SD Card to format...several times on Samsung Galaxy Note 2
Cons: Continued to lose all my Music and pictures on my Samsung Galaxy Note 2. This has happened about 4 times so far. i finally gave up and used another SD Card.
Cons: Got this today -- Windows formatted it as 27 GB, not 64 as advertised. So, I let my phone (Galaxy S3) try -- still 27 GB. So the drive doesn't have even half of its advertised capacity. I will do RMA on it right soon.
Summary: Bought this SanDisk Ultra 64 GB microSD card to use in a GoPro Hero3. The card stopped working, or broke, in only 2 months and only after a couple times of use. While I was using the GoPro camera, suddenly the camera says "NO SD." I removed and replaced the card, powered down and powered up, everything, and still "NO SD." As a test, I put the SD card, using its regular-size adapter, in a digital camera. The camera would not work.
Pros: Card was working fine for the first week. Speeds where decent but I did not do full testing to confirm advertised speeds.
Cons: Card started to load slowly after about a week, It started to have a read error. Than the card would become corrupt and I would need to format it. I have formatted it 4 times so far and this time it cannot format it. It just freezes than crashes and says "windows cannot format drive" So now I'm stuck with a dead card.
Summary: Have sent in 2 reviews on this product and they did not show up. Product did not keep files on card. Using it in a MS Surface RT. Supplier did not return emails. Amazon did refund my money. Last review for this product. Previous reviews: Received order Friday Jan. 24 2014. Did a load test and placed 34.5GB on card then tried to view files. Some of them I could find but others I could not.