Loaded up some files before the weekend when I first received the sd card. Then I went to retrieve those files on Tuesday and the card won't read. Keeps giving error message and saying card may be corrupted, if it reads at all. It's hit or miss it the computer even recognises it's there. Amazon has a great return policy and I can return it for a refund/exchange/replacement, but my files may still be on the card and could possibly be retrieved. I'm worried about my personal info/documents/files falling into the wrong hands. Sandisk warranty requires sending in your sd card too. So, I'll have to cut my losses and just buya different brand. Better safe then sorry.