I have a 16 gig Thrive with 32 gig sd card installed. I can see the card through the file manager on the thrive and it reports proper size, I can create folders on it, and cut and past files to it. However, when I plug in the usb and attach to my PC, all I can access is the internal memory which reports in at around 9 gig total. ( as to why the entire 16 gig doesn't report I'm not sure? ) Anyway, I want to drag and drop files to the SD card while it's in the Thrive but can't get it to show up. I've tried powering off/on, unmounting, re-inserting, all to no avail. I know I could just remove the card, put it in a reader on the PC, drag files to it and reinsert into the thrive... but why can't I see the SD card while it's nserted in my tablet? Thanks!