Thread: How to merge two libraries in Calibre?
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Old 11-01-2025, 04:01 PM   #2
theducks
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Quote:
Originally Posted by MonicaOP View Post
Hi, sorry to bother, but I wanted to know how to merge two separate libraries in Calibre.

Last month I lost one of my hard disks and I had to start a new library in Calibre, 2 weeks ago, after much searching I found that I did a back up of my library 3 years ago and I'm uploading the library now but I'll like to know how to merge them.

Thanks for any help.

Be well, Monica
First I would use Find Duplicates plugin: find Library Duplicates.

<assumes the other library can be seen by Calibre (even if on an attached flash drive)>
Once you resolve what you want to merge (to keep which is more current)

Or, when you want to resolve at a later time....
simplly set Preferences: adding books: Adding Actions (a tab): When using COPY TO LIBRARY to always CREATE A NEW RECORD for each duplicate format (this only kicks in IF the same title has the format)

While viewing the SOURCE library, select all the books you want to merge: right click Copy To Library: <target>optional action
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