Only one SSD can be identified at a time. You need to turn the switch to the corresponding position For M.2 NGFF, this adapter card is only applicable to B-key or B/M-key interfaces, not M.2 NVMe M-key interfaces. Hard disk usage that Does not support AHCI and NVME protocols Only M2 NGFF Hard Disk Supporting SATA protocol (NGFF) 1. Support M 2 NGFF or MSATA SSD is converted to SATA2.5 "/3.5" hard disk for use 2. Fully compatible with SATA3.1 standard 3. Compatible with PCI Express M.2 protocol 4. NGFF and MSATA SSDs are allowed to input 3.3V voltage and 3A maximum current. This adapter card has no chip, and there is no speed. The speed that only functions as a transfer is related to the SSD itself 5. Support 80mm 60mm 42mm 30mm M 2 NGFF SSD 6. Support full height and half height MSATA SSDs Switch toggle design Move the NGFF mode switch upward MSATA mode switch toggles downward Before pur...