Expanding RAID Array Capacity
If the hard drives in your LinkStation are in a RAID 1 array with two drives or they are in degraded mode, you can expand the RAID array capacity without erasing the data on the drives. To expand the capacity, you should have two new drives with larger capacity than the remaining drive.
After you expand the RAID array capacity, the file sharing settings on "SHARED" will be restored to the factory defaults but data will be kept. Please reconfigure the settings to access the shared folders by referring to the "SHARED" section in chapter 7. This behavior will be corrected in a future firmware update.