Transfer pdfs from ipad to mac
OK, so long, long time user, now confronted by Catalina 10.15.7 on my MacBook Pro. I have plugged in my iPad Pro 11" running iOS 14.2 via USB, synced it using the Finder window (no more iTunes app) and all is OK... but... when I open Books on the MBP it lists all the collections I have on the iPad in the left side of the window but the collections are empty.
How do I get the PDFs off my iPad, onto the Mac and for them to be useable? I have backed up the iPad, so know they are safe. However, in the Sync Finder window, if I choose the Books tab and select 'Sync books onto iPad' I get a warning that:
"Are you sure you want to remove existing music, films, TV programmes and books from this iPad and sync with this library?"
Well, no, I want to keep all the PDFs and books on my iPad and copy them on to the Mac.
Both iPad and Mac are using the same Apple ID, so no issue there.
I have found that if you open Music then the device (iPad) appears in the left pane and you can right click on it and 'Transfer Purchases', but this does not happen in Books. Although my collections are listed in the left pane, the device does not appear.
So, does anyone know how I do this please?
iPad Pro 11-inch Wi-Fi