Ledsteplin, thank you for answering!
Yes, these are book files previously downloaded to iBooks. I don't see all of them in iBooks any more, only about a third part from the library is there. I actually simply clicked "yes" when my iPad suggested me to back up my books on iCloud so that they "become accessible on all my devices". It took it a while to upload the files and when I went to iBooks after a while I discovered that a fair amount of them had disappeared...
I hoped to find the rest of them on iCloud drive, but it shows no files whatsoever, tried both from iPad and MacBook.
05-06-2016 02:00 PM