Just like with Google Music Manager, you can backup the database so you can restore it easily after a format. It's not complicated and it could save you a lot of bandwidth and time.
Backing up the database
- Copy %userprofile%\appdata\local\google\drive to a safe location
Restoring the database (before installin google drive)
- Copy the file you previously backed-up to the same location.
- Install Google Drive, choose Advanced setup and select your original location.