DESC: Here's an MP3 player that provides limitless opportunity. Yes, it has 512MB memory storage for MP3 and WMA music files or for carrying file data. The MPC-651 also adds a convenient SD or MMC memory-card slot. This means you can add optional cards for additional storage. As a matter of fact, some computers have built-in digital card reader/writer slots so you can download files directly to your SD and then take it with you to play on the MPC-651. It's so easy and it offers limitless enjoyment.