These units hold up to 2 1Tb drives which can be configured as 2 separate drives or as 2 mirrored drives or 2 stripped drives. They also come with 2 USB ports in the back so that you can plug-in 2 USB 2.0 hard-drives or even a USB flash drive.
From the Linksys website:
- Ethernet connected network storage with two available SATA hard drive bays adds shared storage directly to your network
- Add even more storage with two USB 2.0 ports for hard drive or flash USB storage devices
- Securely share files locally or through the Internet (FTP, HTTP) with no dedicated PC needed
- Advanced backup software included
- Built-in media server for streaming to PC or UPnP AV digital media adapter
