Will it work with a hp SSD EX900 M.2?

To answer your question, Yes, it will work, because it meets the requirement for the adapter.

Does this support NVMe wd Black that is Gen 3x4 bridge - not 3x2?

I do not know if it does or not.

double click image to zoom in

NVME to USB Enclosure Adapter, RIITOP M Key M.2 NVMe PCIe SSD to USB Type C with Aluminum Case in Black (Come with 2 Cables: C-A, C-C)

NVMe to USB Enclosure Case Adapter
M Key M.2 NVMe PCIe SSD to USB C Converter Adapter with Enclosure Case
Hi speed USB 3.1 Type C Gen2 10Gbps
Compatible with Thunderbolot 3 interface
Come with 2* Cables: USB C- C, USB C-A
It's thermal performance is much better than plastic case , ensure NVMe SSD work properly
supports PCIe M.2 NVMe SSD 2280/2260/2242/2230 mm whole size
Only for PCIe M.2 NVMe SSD, NOT support any SATA Nor AHCI B/B+M Key M.2 SSD
Compatible with most NVMe SSD on the market, such as Samsung SM951- NVMe, PM951-NVMe, 950 Pro NVMe SSD, SM961, PM961, 960 EVO, 960 Pro, 970 EVO, 970 Pro, WD Black NVMe SSD, works on Windows XP / 7 / 8 / 10 and MAC OS. Plug and play, no driver required.
Come with Two cables: USB Type-C to A cable and Type-C to C cable, make connection easier!
Note:Samsung 'Magician' software does NOT recognize NVMe SSD through USB port, but "Macrium Reflect software" allows you to clone SSD.

Out of Stock