a box where your drive fits in plus a power supply brick plus some electronics.
and how do I get one,
Simply buy one. :bigsmile: There are local shops and there are online shops. A plain matter of taste.
is there a special one I need for my writer?
You need an enclosure that has an internal Sata interface. External should be USB 2.0 HiSpeed.
If you are in doubt, ask a local computer shop for assistance. Also have a look at the price for such an enclosure. Sometimes they are not much cheaper than a "ready-to-run" external drive (and don't go for an external slim drive without power supply!).