What is your preferred format for music? I use Opus at 192 kbps since I prefer open-source and it supposedly is “near-perfect” quality, but I know a few people who store FLACs instead.
that’s entirely around avoiding crappy streaming services
I think it’s important for OP: I too do store music that I like because I want to avoid to continuously pay for crappy streaming services. Most of my music is bought from Bandcamp, or ripped from CDs that I had previously bought. It needs some tweaking to make those files available on a smartphone, but it’s worth it.