Thanks, I'll try another cable first. Unfortunately it's type B connector on the enclosure which I had actually never even seen before so I don't have any spares lying around to try immediately. If that doesn't work I'll get a new enclosure and failing that maybe a pc case that allows for a disk drive to be mounted so I can just use SATA. The enclosure is USB 3.0 and I believe it actually is a Vantec https://www.amazon.com/Vantec-NST-536S3-BK-NexStar-External-Enclosure/dp/B01MRUN0HQ and I am plugged directly into the motherboard.