This B&H Kit includes Synology DS411slim DiskStation 4-Bay NAS Server (Black) and HGST 4 x 1TB Travelstar 2.5" Mobile Hard Drives providing data transfer speeds of up to 6 Gb/s. It is an excellent way to consolidate, store, and stream data or multimedia files within your home or small business.The DiskStation supports a maximum capacity of 16TB and holds up to four 2.5" (6.3cm) SATA hard disk drives. Regardless of what drives you choose, the DiskStation can configure them in a RAID 0, 1, 5, 5+Spare, 6, 10 or JBOD configuration. This DiskStation is all about seamless performance and power conservation. It has a small footprint and does not take up a lot of space. Furthermore, the DiskStation features a Scheduled Power On/Off feature for saving energy. The smart fan minimizes noise level by turning off during normal operations and spinning at a very low speed only when needed. The DiskStation can function in a variety of ways. You can use it to store and stream photos, videos, music or data within your home, office or over the Internet to select users. This device can be used as a server for FTP, mail, printing, iTunes, photos, videos, website hosting, surveillance webcam operation or downloading http, FTP, eMule and BitTorrent files. You can also initiate immediate backups or create scheduled backups for your Windows or Mac computers connected to your network. The mobile hard drive features 4TB of included storage and a SATA III interface. The SATA III interface provides data transfer speeds of up to 6Gb/s, allowing for quick transfer of data to and from the drive. The 7200 rpm drive speed ensures enhanced read and write capabilities. With a 2.5" (6.3cm) form factor, installing the drive into a variety of computers is simple.