One you get inside, you can get a better look at what is included. In the box is the hard drive unit, manual, power adapter, USB 2.0 cable, FireWire cable, USB/eSata cartridge, and Dual FireWire module The modules are interchangeable depending on which connection is desired to hook up the drive, which will be explained more in the review. The drive sent to us for this review was the 750GB version with USB2.0/eSata/FireWire connections. Also available are a 750GB with only USB2.0/eSata, a 500GB with USB2.0/eSata, and a 320GB with USB2.0/eSata.