M vs : What's the Difference?

pcie m 2 slot   Dan pcie 8x slot

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

I'm upgrading one of the 1TB drives to a 2TB I will use the MSI Expander on my Creator X299 motherboard to install the new drive so I can , SATA & PCIe 07:19 PCIe Card Tests 11:20 USB Enclosure 15:17 Cloning Tools #SSD

ripe rewards slot pcie is about 4x faster The add in cards plugged into a X4-X16 pcie slot will have some sort of adapter  instead, what came before was usually mSATA or miniPCIe drives NGFF replaced this and unified it And mSATA was decently common in oem