The type of memory built into the player for storing music, photos, or voice memos.

Embedded (or "flash") memory, is rugged and very compact, and because it uses no moving parts, the player can't skip.

A built-in hard drive can typically store much more music than embedded memory, but it takes up more space, making the portable larger. Since hard drive players include moving parts, they may not be quite as rugged and skip-free as embedded players.