So Wednesday night my sd card completely stopped working. Said it needed to be formatted, wouldnt format, wouldnt work in any other device, needless to say i was kind of ticked. So thursday morning I took my phone into a sprint store (keep in mind my evo came from best buy) told them the problem, they tried formatting it with no luck so they gave me a new microsd and sent me on my way. Sweet right? Well tonight, I was transferring some files and they were taking a lot less time then normal to transfer over. Sure enough, I pop out my card and they gave me class four card! Needless to say I was very excited. Just thought I'd share.