Here is the sequence of use:
1. The flash drive is inserted into the computer
2. The backup file is generated and copied into the protected folder in the flash drive
3. The folder or the file itself is automatically password protected so that:
a. "normal" user can read the file
b. new files can be added to the folder
c. "normal" user cannot modify or delete files existing in that folder.
d. "super" user can use password to modify/delete files.