There was a bug in iBooks. When file storage capacity is low, iOS deletes some iBooks files. The bug was that it deleted many files even if storage capacity was ok.
And I lost a bunch of PDF stored locally on my iPhone.
Today I synced again a few PDFs from Mac iBook → iPhone iBook.
Have two questions
-
how to check reliably that files are stored locally on iPhone (ie not iCloud)? I mean, I could use the airplane mode and see if files are still openable … but maybe there is a cache or something.
-
actually, how to reliably use only local files – and get rid of iCloud access, at least for iBooks [ iCloud is off on my iPhone for iBooks, but files disappeared anyway ]?
Best Answer
Related question: Books automatically deletes my books when offline, and when there is enough space on device
If you are on iOS 12, then go to library and next to the book at the bottom-left there will be a cloud symbol if it is stored in iCloud and no cloud symbol if it isn’t.
Got to Settings -> [your name] -> iCloud and make sure Books is turned off.
Note: make sure you download all your Books before turning it off.