How to sync iTunes on Mac and PC
I have a lot of music purchased and burned from CD's on my PC but when I log into iTunes on my mac they wont show. How did I get my music on my new device?
MacBook, macOS 10.15
Maybe you ran out of storage on your iCloud Drive. Depending on the size of your library, you could try an external or thumb drive. Perhaps this article will help:
Move your iTunes library to a new computer - Apple Community