Hello joho13,
Please be patient, I may not have time to answer your question in details today...
Here is how we could work together:
- you get an sqlite utility. I simply use the Sqlite Manager plugin available for Firefox. I can search for another one I have tested later, but Google should suggest solutions.
- all we have to check is the content of a table in the catalog.pse12db : the volume_table.
- a screenshot of that table should help us identify how your present NAS is recorded (new screenshot).
- putting one 'dummy' image file in the new NAS will tell us how the new one is recorded
- then I could have a look and suggest how to edit the catalog and to avoid a few traps.
(There is no risk for your images or present catalog if you work on a copy of the catalog. The catalog is the folder you find in the Help menu/System Info of the organizer. You simply duplicate it.