This is sturdy 6TB disk drive with 2x3TB disks. Reasonably quiet, fan makes some noise. When making striped RAID (uses both disk for one volume) you get 271.6/283.8 MB/s write/read speed, which is sufficient even for demanding need with video.
There is no power off swich, and also the blue light, "eye", is quite bright when it is dark - I use post it in fron of it to dim it.
I purchased this to save some USB slots in iMac. For single disk speed, USB3 would have given the same performace.
This product includes Thunderbolt cable. It did not tell it in the description. It also include power cables - one for European, British and USA.