Backing up your library

Settings has an About section that shows both paths on this machine.

Your audio

The folder listed as Audio files. Pictures live here too, in _images folders beside the recordings they belong to.

The database

Everything Trellis knows that is not in the files. On an installed copy it lives at:

~/Library/Application Support/Trellis Music Library/db/trellis.db

Profile pictures sit next to it, in avatars/.

Copying it safely

Trellis runs SQLite in write-ahead logging mode, so a change you have already made can still be sitting in a companion file. Copying trellis.db on its own while the app is open can give you a backup that is missing the last of your work.

Let SQLite make the copy instead. It can run while Trellis is running:

sqlite3 ~/Library/Application\ Support/Trellis\ Music\ Library/db/trellis.db ".backup ~/Desktop/trellis-backup.db"

Quitting Trellis first and copying the whole db folder works too, as long as you take the -wal and -shm files alongside the database.

Keep the live database on local disk. SMB and NFS do not work.

What a database backup leaves out

Your API key and the access tokens for libraries you have joined live in the macOS keychain. After restoring onto a different Mac, enter the key again in Settings and rejoin any shared libraries.