Chosen Solution

I use m.2 ssd b+m key to a usb but my pc didn’t detect it. I look at device manager and bios but it didn’t show up.

Make sure that the M.2 SSD is the correct type of I/O interface for the M.2 to USB adapter. There are two very distinct types. These are NVMe / PCIe or SATA based SSDs. The adapters will only support one type. Does the adapter have an activity light to indicate that it is at least getting powered?