MiniDisc; MD
Refers to the magneto-optical disc format introduced by Sony, commonly used for audio recording in the 1990s and early 2000s.
He still listens to music on MiniDisc.
I recorded my favorite songs onto a MiniDisc.
MiniDiscs are smaller than CDs and can also be recorded on.
I used to listen to music on MiniDiscs a lot back then.
ミニディスク is counted with 枚, the counter used for thin, flat objects like discs.
From English 'MiniDisc', a trademarked format name.