Asking how much by storage volume is no accurate measure. Most audiophiles (like myself) now store their music in FLAC format. That might only mean 4 or 5 albums per-gigabyte.
33.4Gb (18.5 days) on my HDD + 4 DVD's full of MP3's + approx 800 vinyl albums (60's/70's onwards) and approx 200 cassettes/CD's still to rip....
I must admit, I like music.....
Everything ranges from classical to assorted rock to blues to boogie to 'Fusion' to trance/dance, plus everything in-between. The only stuff I don't like is the commercial c**p they play on the radio....