Re: Access Denied to USB Memory Stick
restore the files as root (depending on how you backed them up).
If all you did was something like a "cp -r", then root can copy them back. You might consider using --preserve=mode,timestamps to change the owner. If it is a simple ownership, it may be simpler to just do a "chown -R owner.group ..." in your home directory as root.
This is because F17 changed the default starting UID for user accounts from 500 to 1000. So when you created your login on F17 it was assigned the UID of 1000, where you had 500 before.