sentences:  The capacity of the device may be expanded using the empty drive bay which can house an off-the-shelf Serial ATA hard drive.The maximum expanded capacity of MV1 (first-generation) devices is approximately 1.2TB due to memory limitations.One of the advantages of the system is that if the primary drive is lost (which includes some system software which works in conjunction with the firmware) the system can be restored onto a replacement SATA hard drive using HP's nasrecovery software.