text: Consider a drive that uses USB in order to keep installation easy. It will also allow you to daisy-chain the devices as your needs increase. Since you mention back up of photos and music I wouldn't start with anything less than 250 GB (gigabytes). That should give you plenty of room to get started and monitor things as your storage increases. I have Western Digital drives which have served me well and ship with Retrospect Back Up software. Look for them at places like CompUSA and TigerDirect.