When you have configured Notebooks to store its documents on iCloud Drive, you may encounter situations where Notebooks indicates the need to synchronize a substantial number of documents repeatedly. During the synchronization process, Notebooks may experience sluggishness or even fail
Synchronize Through iCloud Drive
With an active iCloud account, Notebooks can store your documents on iCloud and automatically synchronize them to all connected devices. When set up this way, Notebooks uses a predefined folder on iCloud Drive (iCloud Drive/Notebooks), so you should not create that folder yourself.