SanDisk has just released its
Backup USB which it claims is the first USB dongle with one-button
backup.
SanDisk Ultra Backup and its 64GB USB is designed to collect and
protect photos, music, video, and any type of personal files. There is no
software all you have to do is push a button on the USB and the files are
saved.
Of course if you have more than 64 GB on your hard drive you are toast,
but otherwise it is a pretty good idea. The disk is protected with a password
and AES encryption. This is in case you lose it which with something that small
is easy.
More
here.