Doppelganger Description:

Doppelganger is a backup
and restore utility that sits in the system tray and protects against the
loss of important data in the event of a disk crash by copying selected
files and folders to a second hard drive, removable drive (eg Zip Drive) or
network drive at user configurable time intervals. Optionally, Doppelganger
can perform backups during Windows startup and shutdown. Selection of files
and folders is achieved using drag and drop operations.