Is anyone else having this problem with the XT907? I purchased a 32gig MicroSD from Sandisk (class10) a few months back and it worked great for about 3 weeks. I use at as a storage for my music so I could get rid of my old iTouch. About 3 weeks in the card just became completely unreadable in the phone or using an SD adapter in any computer. Literally died... I was lucky enough to have a very kind seller on Amazon that offered to replace it for free with another. Again, all worked great for about 2 weeks. This morning I went to listen to music and every file it said it could not open. It then started recommending I format the card. I obliged (grudgingly, it takes several hours to copy 32 gigs of music) now it just says the file format is not supported after clearing the card. I'm torn now on if the cause is my phone or this particular card from Sandisk. I'm hesitating on purchasing another $40 microSD card if this is something that could continue... Has anyone else heard of this or know of any troubleshooting I can try? The phone is only a few months old now and was new at purchase from Verizon. Thank you!