Add convenience and peace of mind to your home or small office with the QNAP TS-433-US 4-Bay NAS Enclosure providing external storage to back up your important files, photos, and other media. Featuring a stylish, low-profile design, this entry-level NAS is built to blend in with most environments while delivering optimal airflow to its internal components. You can install four separately sold 3.5" / 2.5" SATA III drives into its bays and connect the enclosure to your network through its Gigabit and 2.5G Ethernet ports, allowing you to use Apple Time Machine on Macs and NetBak Replicator for Windows to automatically back up your computer in the background.