I am curious how the files and folders got copied into the mount point folder. The kindle may have had mount problems on startup, then formatted your USB drive partition, then again failed to mount it but populated the folder anyway (a bug in the startup scripts)...
This is a bit confusing having our dialog spread across three threads (this one, plus two more in the dev corner). Our conversation is spread across all three threads, and we are both continuing to post to all three of them. We need a forum RAID management tool to make the three threads appear as one virtual thread.