WD1200JB not recognized

Hi beaverfix, welcome to the Community. External USB drive enclosures are not supported, I recommend you to connect the hard drive directly to a computer motherboard and verify if it is working correctly. Some of the other Community users could also give you some advice on enclosures that work for them. 

Installing a WD SATA, SAS, or PATA drive in an external USB/NAS enclosure or Personal Video Recorder