What was your first portable music player (by which I mean something like a record player that's designed to fold up and be carried from place to place)? Your first personal portable music player? When did you get it? How many music-carrying items (i.e. things that hold recorded sound) did you carry when you first got your personal portable music player?
And to answer those for myself: I had a portable reel-to reel tape player when I was young - maybe in the late mid-1960s. I remember tape recording an episode of "Get Smart" on it.
My first personal personal portable music player was Sony Walkman cassette player which I bought in Japan in 1980. I didn't carry any more than the one cassette I chose to put in the player itself.