Database migration from Nvidia Shield Pro to NAS - possible?

[OttoKerner]

@ugyes

My concern is NAS cannot translate external path (mounted storage on Shield) into internal path (NAS own folders) for the media libraries.

Yes. It won’t do that. Particularly not with music.
Your only chance is this: [HowTo] Plex database modification - Moving media the right/wrong way - #10 by jelwell