M2 is an ssd hard disk with interface m.2. There are many ssd hard disk interfaces, and m2 is just one of them.
The m.2 solid state drive is mainly divided into a solid state drive with a PCI-E interface and an ordinary SATA interface.
The stability of PCI-E solid state drive is fast and fast. The disadvantage is that the notebook can support PCIE solid state hard disk before it can be used. It only supports Microsoft original win8.1 and win10 systems. If you do not know your notebook support is not supported, it is recommended to use the SATA interface m.2 solid state drive
Solid State Drives, also known as solid-state drives, are hard disks made from solid-state electronic storage chip arrays, consisting of a control unit and a storage unit. The specification and definition of the interface, the function and the method of use are the same as those of the ordinary hard disk, and the shape and size of the product are also consistent with the ordinary hard disk. It is widely used in military, vehicle, industrial control, video surveillance, network monitoring, network terminals, power, medical, aviation, navigation equipment and other fields.
The storage medium of the solid state hard disk is divided into two types: a flash memory (FLASH chip) and a DRAM. The operating temperature range of the chip is very wide, the commercial product is 0~70°C; the industrial product is -40~85°C. Since SSD technology is different from traditional hard disk technology, many emerging memory vendors have emerged. The new generation of solid state drives generally use SATA-2 interface, SATA-3 interface, SAS interface, MSATA interface, PCI-E interface and so on.