Key Features Easily add additional drive capacity to a Thunderbolt NAS Missing mode protection Powerful QTS Storage Manager Efficient backup solution for Thunderbolt NAS Smart power design Easily add additional drive capacity to a Thunderbolt NAS Simply connect the TX-800P to a Thunderbolt NAS via Thunderbolt 2 cables & power it on. The Thunderbolt NAS will automatically detect the hard drives in the TX-800P as newly-installed local drives. The Thunderbolt NAS capacity can then be seamlessly expanded as a large volume by using the powerful QTS Storage Manager. Missing mode protection If your TX-800P is accidentally disconnected, the Thunderbolt NAS enters missing mode & blocks I/O access to protect the stored data. The system can then recover from the missing mode to the normal state with data staying intact. Efficient backup solution for Thunderbolt NAS In addition to expanding an existing volume, you can use the TX-800P as a flexible external storage to perform speedy & secure backup tasks for the Thunderbolt NAS. The QNAP RTRR (Real-Time Remote Replication) or rsync service lets IT administrators back up Thunderbolt NAS data to the TX-800P on a real time or scheduled basis.