There is a problem with iBooks: books are getting removed locally and uploaded to the cloud, if the space is running low on the device. But with iOS 11 some users experience unwanted file upload even when there is no space shortage.
But actually there one working way to stop deleting books from iBooks:
- Go to Settings > iTunes & App Store
- Check off “Offload Unused Apps”.
This advice was provided by Apple Support, who reached me out after tweeting about problem.
These are options, you can try, if primary one doesn’t work for you:
- Remove iBooks
Reinstall it from AppStore
Download all the books.It might be useful also to do this afterwards:Settings > Apple ID > iCloud > iBooks: OFF
Settings > Apple ID > iCloud > iBooks: ON
- Check the appropriate settings, stop iCloud syncing at:Settings > iBooks >Sync Collection: OFF
Settings > Apple ID > iCloud > iBooks: OFFAnd then upload books to the device using wire, or just get them through Cloud Storage (Dropbox, Google Drive, Yandex.Disk or etc).
As the downside, your notes won’t sync, but you will keep the books on your device.
- There is yet another hack to stop iCloud from deleting books: turning airplane mode.