Maxtor OneTouch 3 User Manual page 15

MAXTOR ONETOUCH III TURBO EDITION MACINTOSH INSTALLATION
When finished, you will have a copy of your Mac OS and all
applications and data on the OneTouch III. To boot from your
OneTouch III, access System Preferences - usually located in
the System Dock.
The System Preferences window is displayed.
Click Startup Disk.
The following is displayed:
Select the volume associated with the OneTouch III and click
Restart.
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Click Restart once again when asked to confirm your choice. The
system will then reboot.
After restart, you will notice that the system is now booted from
the OneTouch III.