I had the same problem with the DROID 3, I went through two replacements before getting rid of the phone completely. I now have the Bionic witht he same issues, I'm guessing it's a bug in the phone since the Droid 3 and Bionic are almost identical minus the 4G and keyboard. I use my external SD card for media (music, pictures, videos, personal files...). I store over 20GB of data on the card. Everytime I undock the SD card or reboot the phone I have missing data from the card when it is re-docked. I can't find any patterns. The amount of data, type of file, and number of items changes each time. I lose anywhere between 50 MB -1 GB of data after each re-dock. My phone just randomly deletes/loses files. It's pretty annoying, I'm always reloading my card with my media files. I'm to the point where I don't want to store anything on the external card. If I put the files on the internal sd card, I don't have the data loss issue. On the same note, I have many problems with apps receiving an intermittent write access error to the external. Sometimes they write just fine to it... others, no luck. I've tried reformatting the card in the phone and also through my pc using a card reader. No luck with these different formatting procedures. I've tried three different brands of SD cards and three different size and class cards. same issue on all three. Has anyone experienced data loss on the external data card and have you found a cause or solution???