motherboard 4 m.2 slots
Solved: M.2 Slots for Motherboard 8860 A(SMVB)
The M.2 slot is newer and lets you connect SSDs directly to the motherboard without needing cables. M.2 SSDs are small, like chips, and they go right into the slot on the motherboard.
Can I Use a PCIe 4.0 NVMe SSD in a PCIe 3.0 Motherboard Slot?
ASRock B650 PG LIGHTING AM5 ATX Motherboard, 4 slots DDR5, PCIE 4.0 x16, 3 M.2 slots, 2.5Gb Lan, 7.1 Nahimic Audio , Rear USB3.2 Gen2X2 Type_C , 14+2+1 Power Phase, AMD CrossFire.
How to Install a Second Hard Drive Windows 10 | Detailed Tutorial
To install an M.2 SSD, check if your motherboard has an M.2 slot and supports the drive's size. The 2280 size is common for desktops.