The WD My Cloud Mirror Personal Cloud Storage allows you to keep all of your content in one safe place on your home network instead of on a remote server. Enjoy photos, videos, music, and more from anywhere on your PC, Mac, tablet or smartphone.Easily back up the files from all of the PC and Mac computers in your home using WD My Cloud 4TB Personal Cloud Storage. With the default RAID 1 configuration, also known as mirror mode, all of the data you save to the cloud is backed up automatically to the secondary drive. The external 4TB cloud storage ensures that your data is backed up in case the original drive of your device malfunctions or fails. It is compatible with a variety of Windows and Mac operating systems. The WD My Cloud Mirror Personal Cloud Storage can stream data directly to both DLNA-compatible and UPnP-compatible devices such as game consoles, smart TVs and more and is also available for both iOS and Android devices.