[droopy]

Originally Posted by ilovejedd

Personally, here's what I would do in your case:

1. tag the books with the backup library name
2. for each backup set:
   1. create the backup library
   2. copy the books to the backup library
   3. create a catalog
   4. zip/tar the backup library
   5. move the zip and catalog to Google Drive
   6. delete the backup library
   7. delete only the formats for the books you just backed up from the original library but keep the metadata entries
   8. rinse and repeat

About Step G. What's the quickest/best way to bulk-delete the "formats" for a group of books at once?

Originally Posted by ilovejedd

I'm aware. You'll note the steps I posted are for partial backups. I meant to type "You can still split zip files anyway" in case you prefer to upload smaller 1GB chunks for backup or something.

Ok, thank you for clarifying and for taking the time to read the thread.

Originally Posted by ilovejedd

Yes, being able to know and search for offloaded books is the advantage with this method.

I love this. I was gonna create a CSV for each separate library. But your method is much nicer.

Originally Posted by ilovejedd

Iirc, there's an option in Calibre to merge similar/identical entries when copying books between libraries. No need to handle this manually.

Hopefully someone can say how to do this.

Originally Posted by ilovejedd

Alternately, you could always filter the empty entries in the original by the backup tag, delete them, and then do the copy from the backup library.

Ok. Good idea.