Mac Mini - Books wont synch to icloud
I have tried everything I can find on the net. Logging out and back in, deauthorizing and reauthorizing, turning Book synch on and off. I'm paying a lot of money for iCloud storage, but I cannot get books to synch to iCloud. Someone help! I am using a mac mini 3 GHz 6 core Intel Core i5. It has 16 GB 2667 MHZ DDR4 memory. The hard drive is only 256GB and I'm out of room. I have more than 100 GB of that in audiobooks, so offloading them to iCloud would free up much needed space. Someone please tell me step by step how to get my books to synch onto iCloud so that I can remove them from my man mini!
Mac mini, macOS 14.6