[gbm]

This is how I copied my library from my Linux box to my Windows 10 tablet, with no problems.

1. Set up file sharing between your Mac and Windows 10 PC's'.
2. ***On your Mac make a copy of your library using the Mac's file manager***.
3. On your Mac open calibre and change to the copy of your library you just made.
4. On your Mac in calibre use switch/create library to make a new blank library in your shared folder using copy structure from the current library.
5. On your Mac in calibre select all ebooks and use copy to library delete after copy to copy your current library to the new library in your shared folder.
6. Now using the file manger of your Mac copy the library in your Mac's shared folder to a shared folder on your Windows PC. Do not use Dropbox or any cloud service. You can use a usb stick but faster using network.
7. On your Windows PC move your library from the shared folder to the root of your c drive or to the root of your user account. You can use the root of any other drive you have installed.

This should give you a working library with no too long file names.

Remember step #5 open that library with the Mac's file manger any ebook files left will be one's you will have to manually check to make sure they where transfered.

Now go and run library maintenance.


luck
bernie