My Passport 2017 "Don't Have Permissions"

Hi there,

I would love to retrieve my Music/iTunes library from this old drive since Catalina vaporized my Music somehow.

-This Passport is full – I quit using it because it said there was not enough space to backup.
-I can browse to a May 2017 backup but I can’t see it in Time Machine
-Time Machine is set to back up Music
-My Music folder from May 2017 says I don’t have permissions and says it is 0 kb. It has a red dot on it.

If anyone can let me know how to regain my permissions I would be most grateful. I have searched the knowledge base here and seen people with similar questions but no solution that worked for me.

All the best,