Same same
I am having the same issue here.
I have a completely stock HTC Thunderbolt.
I can access my music saved on the SD card.
But I cannot even connect it to my laptop via USB disk drive. It shows a CD drive? I cannot install/update apps at all or access my Apps to SD.
For a while when I'd reboot the phone, it'd fix the issue. Then it became every other reboot would be successful..Then less and less to no longer.
I've tried formatting the SD card, and reinstalling using USB connection...I can't seem to find anything else in the forums about what to do...HELP?!
Don't fail me now, Android folks!