So a while back, I had a 64gb MicroSD that I had planned to use with my Supercard DSTWO. Things were going great until I suddenly discovered that it was corrupt when I booted into Windows. I never figured out what happened to it, exactly, until today when the same damn thing happened to my new 16GB card. I left it in my computer while I was in Kubuntu 14.10, and then rebooted the system. When I booted back into Windows, it wasn't recognized. I checked with GParted as well, and the whole thing just went completely corrupt. My best guess, currently, is that Kubuntu 14.10 doesn't properly unmount the drive (I'm using a T-FLASH USB MicroSD reader) when it shuts down. So, word of warning, ya'll. Eject your USB drives before you shut down, or you'll be in for some pain. Now to return this freakin' MicroSD and hope I get a refund.