ICY DOCKRugged 4 x M.2 NVMe SSD PCIe 4.0 Mobile Rack Enclosure for 5.25" Bay (4 x Mini-SAS HD) | ToughArmor MB720M2K-B

M.2 SATA is only 0.6 GBytes/s, where most M.2 NVME SSDs are ~8 to ~16 GBytes/s, 10+ to 20+ times faster. For such slower (colder) SATA storage, you are better off with cheaper (though bigger) spinning hard drives. The MB873MP-B V2 product makes much more sense, pairing pricy M.2 NVMEs with equally pricy OcuLink connections for matching high performance.

Like most all products from Icy Dock are great [market leader Products and Company]This particular product however is nothing to rave about. MB852M2PO-B[The only one in their product line that I know of, to be a trap]The Icy Dock website lists to date [July 17 2023] only 2 host cards that would work with this dual tray Device. Those were the 2 cards listed from day 1 as well. Both of those cards are at best $550.00 up to and exceeding $1,000.00, depending on where one shops, most used ones are at that $550.00 + amount.This product is really a great idea, but the economics of it, will never compute. Have a $200.00 product that works only with another $550.00 up to $1,200.00 extra parts, like host card and cables.Someone's bonus will have to be recalled on this one. Maybe the unsuccessfully used and purchased units replaced by their better successor, ToughArmor MB842MP-B. That looks to be a better solution for the same need. ToughArmor MB842MP-B came on the market roughly 3-4 months ago. I know I would make that trade with my DVD Slot Rack, that is caching dust at best.