Sounds like you still have it under /home/user/MyDocs
But it gets "hidden/overlayed" as soon as mmcblk0p1 gets remounted again (on disconnecting USB).

You need to unmount (get root in advance)
umount /home/user/MyDocs
check and move away all entries under /home/user/MyDocs
remount by
mount /home/user/MyDocs
and move all desired entries back to /home/user/MyDocs

If you do not know what this is all about, it is time for an android with native client



Maybe scorpius can add a check for USB mass storage (e.g. lsmod | grep g_file_storage) and disable the import? Just a dumb suggestion