Usually 3-5 Days. The HDCD1 is a rack-mountable dual CD player with built-in 40 GB hard drive. The HDCD1 can store an entire DJ collection for the ultimate in portability, organization, and convenience. MP3s and uncompressed audio files can be ripped from either of the built-in CD players, transferred from computer over USB, and even recorded from turntables and other sources through analog inputs.