External Drive not recognised every time I restart PC

Thank you for the response. I ran both the quick test and the extended test and they both pass, so the drive itself seems to work fine.

I have the original cable that came with the disc, why would I need to get another one? The USB port is not the issue, I use a back USB port that delivered energy just fine to a Maxtor drive, and I have a top of the line 800W energy font.

Any other ideas?

Thanks!