I used to. But in the later years I found it very difficult to carry this much weight. In addition to that, I've realized the transient nature of my music tastes and my over-reliance on music. Also my priorities have changed a lot. Music is far from essential for survival, and when the times get rough (when you move a lot, and all you can take with you is your laptop), it's much easier to access an online library than your own physical one. I've decided to keep the mp3s (m4as, wavs, flacs, etc.) of the songs that aren't on Spotify and remove everything else.