Mobile hard disk, as the name suggests, uses hard disk as storage medium to exchange large capacity data between computers, emphasizing the portability of storage products. Mobile hard disk uses USB, IEEE1394 and other faster transmission interface, and can transmit data with the system at higher speed.
Because the hard disk is used as the storage medium, the read and write mode of the mobile hard disk is the same as that of the standard IDE hard disk. As of 2015, the mainstream 2.5 inch brand mobile hard disk read speed was about 50-100MB/s, writing speed of about 30-80MB/s.
Most of the mobile hard disks on the market are based on standard hard disks, but only a few are small hard disks (1.8 Inch hard drives, etc.), but the price factor determines whether the mainstream hard disk is based on a standard notebook hard disk.