what is m 2 slot: SSD M.2 PCIe. CÁCH CHƠI - hii88. Raspberry Pi 500 And The Case Of The Missing M.2 Slot | Hackaday.
If you do not have an M.2
slot, you can purchase an M.2 PCIe adapter which is installed like a graphics card; the M.2 SSD is installed in the adapter.