I use nvme enclosures. Very fast and very hot. I also got some fikwot ssd based flash drive that’s about the size of a common flash drive. I’ve seen it sustain around 500MB/s very well. Some type of metal enclosure. At this point I’m probably only buying enclosures and small NVME drives or USB sticks where the enclosure is metal and reviews seem solid saying it’s hitting SATA 3+ speeds sustained well