For 4TB or below M2 NVMe SSD drives, we recommend the WD Red SN700 for its balance of speed, power consumption and longevity. You can of course source other brands should you wish.
Make sure to avoid SSDs with large heatsinks, as these can prevent you from fitting the guard shield.
For the 8TB option, we use a Lexar NVMe M.2 SSD, as WD Red drives are not available in this capacity.
Ensure that any M.2 SSD you install is NVMe, as SATA M.2 SSDs are not supported.
Ensure you follow the SSD installation guide correctly, found here