I use the Western Digital "MyBook" The first one I got 6 yrs. ago. After about a year, I was in the basement carrying it and it fell out of my hands on to the concrete floor and bounced around some. So, it kept working fine, and there wasn't any damage done to the case either!! It still is working. Then about a year ago I got another Western Digital "MyBook" This one is 4 TB, plus it has USB 3.0. It's been good and reliable too.
I use them to store my system backups. I have a lot of PCs that I back up routinely. E.G., my G73 laptop has about 20 or more complete system images. Crazy right? But If I run low on room I'll get rid of the middle ones, and keep the oldest and the newest.
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Asus Maximus V Extreme BIOS 1903, see specs above avatar.
Asus G73 jh A1 laptop, BIOS 213, vBIOS OD2, 8 GB Ram, 240 GB Intel SSD, 180 GB Intel SSD. Win 7 Pro. Purchased new from PowerNotebooks.com in May 2010.
(both have 1920X1080 hd screens, mine above, hers below )
Asus G73 Sw XR1 laptop 8 GB Ram, 160 GB Intel SSD, 80 GB Intel SSD. Purchased used >Ebay 1/10/13, Did clean install of Windows 7