Saving custom tag data

[Fox63]

i had to transfer music bee to another pc. Tried to back up everything and everything seemed fine. Instead, I realized that the data relating to the custom tags were not recovered.
Where does music bee save this data?

[sveakul]

They are saved either as tags within the music file itself, or only within the MusicBee database (Library) file, depending on what you chose to do in Preferences/Tags (1)/Custom Tags when you created them.

[Fox63]

They are saved either as tags within the music file itself, or only within the MusicBee database (Library) file, depending on what you chose to do in Preferences/Tags (1)/Custom Tags when you created them.

Thanks for the reply.
Is the database file MusicBeeLibrary.mbl?
In the preferences I chose to save in the MB database and in fact in that file written above the data is there but is not inserted again in the tags designed to contain them in the new installation.
Why?
Thank you

[Fox63]

EUREKA!!!
I had put the library files in the same folder as MB, but actually they should be placed in the MB folder contained in the system MUSIC folder.
Thank's

[MovingFromMM]

This page could be of interest https://musicbee.fandom.com/wiki/Custom_Tags