M.2 SSD Heat Sink Installation

Hi!
NAS models that support M.2 SSDs are packaged with M.2 SSD heat sinks. For reliable operation, it is recommended that you install the heat sinks onto the SSD controller.

my ssd are: WD Red™ SA500 NAS SATA SSD 500 GB to 4 TB 2.5”/7mm Cased | Western Digital

and NAS are: QNAP TS-473 Download Center | QNAP (US)


i want to know where is contoroller on this M.2