The RAID Tower IV is built basing on the Storage Tower platform that features four 5.25" drive bays in a lightweight aluminum and compact chassis with a stylish and functional front bezel. Depending on the model, up to six 3.5" hard drives can be installed into the RAID Tower IV. The drives can be configured as a RAID set and be connected to the computer via a single USB 3.0, USB 2.0 or the high speed eSATA connection. Each model comes with everything needed for connecting to the computer. All is needed is to add your own hard drives and configure the RAID via either a simple on board rotary switch or software utility depending on the model.