What is an M.2 slot on a motherboard used for?
To connect an M.2 specified SSD, your motherboard will need to have an M.2 slot.
M.2 8x4 Silent Gen4 PCIe Card - SONNETTECH
PC-Hardware/The M.2 slot: What is it and how can I use it? ... On the other hand, a PCIe 3.0 SSD works fine in a PCIe 4.0 M.2 slot.
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G650-06076-01 Coral Accelerator Edge TPU M.2 E-key slot. The Coral M.2 Accelerator with Dual Edge TPU is an M.2 module that brings two Edge TPU coprocessors ...