Western Digital Passport USB HD $80 for 500G
Have a pair - one for cloning of OS and one for backup
Can fit in your back pocket.
Also have a Passport 1T for the family backup
The Seattle SharpShooter - G27/33, G19, G29, G20, G21, G34, G35
Reload .223, 9mm, 40SW, 357 SIG, 10mm, 44Mag, 45 ACP Lately?