Specifications: Thunderbolt 3 NVME M.2 SSD Hard Drive Enclosure. ORICO Aluminum Thunderbolt 3 40Gbps NVME M.2 SSD Enclosure 2TB Aluminum USB C with 40Gbps Thunderbolt 3 C to C Cable For Laptop Desktop.The enclosure does get warm, but not warmer than a Samsung T5 external drive during a lot of write cycles. Until prices on Thunderbolt 3 devices come down, I will use this Fledgling enclosure and Samsung NVMe M.2 SSD for the 'work' drive and then use SATA SSD drives as 'near-line' and distilled archives / backups.