fwir this cpu eats about 100watt on its own so not ideal but yeah these were/are good cpus
If you were to put a few extra hard disks into this, would it be any good as a back up / file storage device?
"old" does not mean "slow" This goes for any cheap desktop.
This is a great PC, very powerful. Picked mine up on eBay a while back for Lightroom and Handbrake. Works well, although I've upped RAM to 16GB and added a load more storage. Perhaps a little pricey here given the small HDD and lack of RAM.