Post contributed by Amy Schwartz of IRT:
I have an EVO Shift that I got back in February, opting myself out of the UST program. It’s Android, so I thought I would send this in case a Thunderbolt user runs into this in the next couple of months. My SD card kept “unmounting” itself and going into read only mode. This was extremely annoying because I couldn’t take or access pictures or download anything. I poked around the Sprint site and found a suggestion to check for updates. I did this by going to Settings > System Updates and just checking for all the different kinds of updates listed. Something it updated seems to have worked…so far. Just an idea. Removing the battery and properly removing the card and putting it back in (done repeatedly over days) absolutely did not help.