but have sept UPS for the backup drive. they are dirt cheap.
I like the older silver seagates, have been rock solid for me. Even used as a primary drive for a while but too slow on saves of massive files.
Remember, that whatever you use, if w2k or xp crashes or power goes out on the backup drive without windoze closing it even if you haven't done anything recently it seems to damage it, and no choice but to reformat if you want to get all your free space back. You won't necessarily lose all your files.
I had serious issues with a 750 gig seagate one touch:
my w2k system WOULD NOT BOOT with the thing attached to usb port. However it WOULD recognize it if I plugged it in after booting. Possibly because they have boot sector on this and recovery software.
2nd prob: the power switch didn't work to turn it off. I could use the power switch to turn the thing on but not off even holding it for infinity. (creepy non-switch, 'touch' switch). The one touch also got REALLY HOT at base where I had it sitting on a painted wood shelf. Scary.
The older silver ones work great, use them as backups now. 300g, probably 500 gig, etc.
don't know if still available, probably.
you can also get an e-sata hybrid drive which does both usb and e-sata. Fry's didn't have pci e-sata cards so I skipped it. only pci-x which didn't fit the slot.