Sony to release digital Walkman with built-in hard disk

TOKYO, Japan - Sony Corp. said July 1 it will put its new Walkman NW-HD1, capable of storing up to 1,300 songs, on the Japanese market on July 10 to pave the way for global sales. Containing a 20-gigabyte hard disk, the NW-HD1 can store the equivalent of 900 compact discs and run up to 30 hours on a single charge of its battery. It can be hooked up to a personal computer to download music.