Well, anachronistic as it may seem, I buy physical media, and rip them. I know it sounds very 20th century, but it works, you really own the stuff in an irrevocable sort of way, and second-hand CDs and DVDs are really cheap these days. I fill about 75% of a 128GB SD card with MP3s.
I like paper books, too. I have many thousands of them.
I like paper books, too. I have many thousands of them.