O.G.
Just as with many other reviewers here, my card worked perfectly for the first week and a half, and then suddenly lost its format and could no longer be reformatted, while at the same time overheating dangerously. Sandisk is currently issuing an RMA to replace it, but I am worried that the replacement could also end up being defective. As is evident from the 1-star reviews here, the rate of such defects for these cards is about 10%, which to me seems like an absolutely unacceptable number for a memory card for a major manufacturer. And it's not like Sandisk hasn't had a heads-up on this problem -- the negative reviews have been there for quite a while. Clean up your act, SanDisk!