You should post this on "The Official Brystoon SP3 Thread." It gets far more traffic, you're more likely to get a responsee.I don't use mine in bypass or with a phono stage, so I can'y help. Good luck.
It may be n issue with how your drive(s) is/are formatted. Sorry I'm not at home and can't be more help, but I've had similar issues in the past with other devices and the drive formatting/partitioning was the problem.
Not to worry---I didn't take it as an attack. I just wanted to let people know that there were very happy owners out there with larger sets. Also I think anal retentiveness and pickiness sort of go together naturally.