Which file systems does ROCK support?

[ged_hickman1]

No it isn’t. Search the forum “APFS USB” or Google “roon APFS USB”

Nucleus+ can't see my HFS+ USB drive connected to it

Thank you for your help John and Ged. It turns out my disk format was not HFS+, but rather the new APFS. I have formatted a new drive as exFAT and that drive can be used on both my MAC and the Nucleus+. Now it’s just a question of copying 2.5 TB of music.