I planned to do that with old 64 MiB or 128 MiB SD cards and a car radio with SD support: One SD card = one album. However, nobody still makes SD cards this sm

I planned to do that with old 64 MiB or 128 MiB SD cards and a car radio with SD support: One SD card = one album. However, nobody still makes SD cards this small, and using a 16 GiB card for 1 album seems wasteful :) But floppy disks would be much nicer.