TDK MD-SG74S10SB 74 Minute Mini-Disk with Storage Box (10-pack) The Digital Age opened up when Sony introduced the MiniDisc audio recorder and, along with its emerging popularity, MiniDisc technology is getting better and better TDK MD-SG Recordable MiniDiscs are magneto-optical discs that can be recorded upon over and over again, and let you take your own ultra-high-quality digital mixes with you wherever you go With many years of top caliber experience in developing high performance audio/video/data storage media, the MD-SG is designed to offer superior performance The disc has an enhanced protective layer and newly-developed improved protective cartridge that, jointly, provide high-quality recording and playback performance, especially important when used in portable applications