Khe cắm mở rộng M.2 là gì?
... 2: Aluminum Case For Raspberry Pi 4, With M.2 Expansion Slot. Magnetic Design. Magnetic Removable Top And Well Designed GPIO Header. M.2 Expansion Slot.
Thẻ mở rộng - Wikipedia
An expansion card plugs into an expansion slot on a computer motherboard to provide additional functionality. Expansion slots include PCI, AGP, AMR, CNR, ISA, ...
Motherboard Expansion Slots - blog.trainace.com
PCI, PCI-X, and PCIe are different expansion slot technologies used in PCs. PCI was the first industry-wide expansion slot solution and used parallel communication.