What is the best format settings to store a physical music?
I did look at Flac but the data is almost the same size as the uncompressed Wav and none of my devices or self hosted services seem designed to play flac files. Everything gets converted.
What are people using?
This is good advice right here. Unless you’re a dj (even then it’s overkill) and or have incredibly high end equipment (again, it’s probably overkill), just go with some high bitrate mp3. MP3 is incredibly compact, everything plays it, and has all the metadata needed. Seriously you can’t tell the difference.