READ THIS FORUM to learn where externals make find copies but are too unreliable for a single unit to be trusted. In short I think you need no less than 3 drives or else you fail the old backup guidelines that have been here since long ago.
Also, consider a DROBO in it's RAID 5 setup.
I have gained great insight from other CNET Forums and received helpful advice, pertaining to other issues, on the Newbie Forum, so here it goes.
I am needing to store critical, remastered archival audio & video externally from my laptop. Should I use a HDD or a "personal storage device?" My HP G60-235DX has three USB2.0 ports and runs Windows Vista Home Premium, along with Nero 9 Mutimedia Suite. Since I want to keep my PC as "clutter free" as posible, I thought it would it be a good idea to have two 1TB drives: one for videos/picures, and the other for music/documents. Should I use two? Am I on the right path to achieve my objectives? A great deal of work goes into these remasters, so I need a stable device(s) upon which to store the masters for myself and clients.