Quote:
Originally Posted by gianni_fed
Thanks to all,
I begin to believe that the problem is in my PC, it may be in the operating system, because all the problems I have encountered in the "original" version of my library.
I backed up with the "save on disk" Calibre function.
Please, can someone help me? Thank you.
Gianni
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I'm still confused. I've never used the "Save to disk" feature because my library is all local and all backups are part of my usual backup routine. I just tried now, and it seems Save to disk saves all the files separately - so you should be able to test the files in your backup and see if they are readable. If your backup files are good you should be able to use them replace the corrupted originals - presumably delete and reimport. If your backups are not good, then you are probably stuck trying to recover your files from wherever you downloaded them originally.
I notice that the library "Export/import all your calibre data" saves everything to a single folder as one or more files of what seems to be a proprietary format (at least 7zip fails to make proper sense of it) and so you would have to use Calibre to recover any data from that folder. (Which makes testing the backup a bit more difficult: presumably create a new library and then import into it using Calibre.)