It's smorgasboard. Some are MP3s I probably downloaded more than 20 years ago, others are ripped from CDs, others are bought from Amazon or other sources. The c

It's smorgasboard. Some are MP3s I probably downloaded more than 20 years ago, others are ripped from CDs, others are bought from Amazon or other sources. The caveat with Amazon, Google play, etc is that they must be some DRM-free format. I'm not an audiophile, and medium-to-high quality MP3s are fine by me. I've actually got a record player, so most of the Vinyl stays in vinyl format. As far as getting music to and from my setup, I'm usually pretty old fashioned. I have an external hard drive that I use for backup, and a thumb drive or two. Further, I have Owncloud set up on a Raspberry Pi, which is nice for moving a few files, but wouldn't be suitable for moving files of any real volume. Obviously, anyone could build a more mature and robust network drive if they liked, but this setup is more than suitable for my needs.