Sync 2nd photo library (file) to icloud drive
Is there any way of syncing an additional photo library file (not the one set up on icloud photos) to your icloud drive? It says inelligible under the file on my mac. I don't need access on my iOS devices etc, I just want the file saved in iCloud drive as well.
I have thought of putting it in a zip container to force it to sync but then I would have to compress and uncompress it every time I want to access it.
MacBook Pro 13″, macOS 13.3