Baselerd wrote in post #8265616
Why can't you just install a hard drive inside your PC? That's waaaay cheaper.
That's not always practical, it depends on what the OP needs.
The fact that they are specifically looking for one powered by the USB suggests that this is for mobile use with a laptop, where powerpoints aren't always an option.
I use my 250Gb drive (USB powered and easy to slip in a pocket) for my 'working' drive. I keep all recent stuff I want to be working on on it and I can plug it into the laptop when away from base, handy as I get a lot of spare time at work, then simply plug it into the PC when I get home and carry on where I left off, without any messing around swapping files around.
Not something that can be done with an extra internal drive in the PC.
I also have a LOT of files to store and so have several regular sized external HDDs (around 14 I think) to keep them on and back everything up - including offsite backup. No way could I fit even the ones that stay at home inside the PC (which has two inside it already).
I presume (if you arent using an external HDD) that you have all your data backed up on DVDs or some other method as well as the RAID. If not, your data ISN'T backed up.