2 Types of SSDs: SATA and NVMe

SSDs with B+M keying maximize compatibility in both slots, and will operate with 2x lanes of bandwidth SSD keying M

An SSD is a storage system that you install directly onto the motherboard These smaller SSDs take up less room and reach higher speeds

m2_1 slot This video explains how to select which slot to use on a motherboard for the best storage

m2 slot pc is a slot that can interface with SATA , PCI Express