The difference between usb1.1 and 2.0

USB1.1 has two modes: 1.5Mbit/s and 12Mbit/s. In addition to being compatible with the first two modes, USB2.0 also adds 480Mbit/s (60MB/s ).

The maximum theoretical transfer rate of the USB1.1 interface specification can reach up to 12 Mbps/s. When converted into bytes we often come into contact with, it is 12 Mbps/s divided by 8 = 1.5MByte/s. The actual transmission speed is 800KByte/s.

The maximum theoretical transmission rate of the USB2.0 interface specification is up to 480Mbps/s. If converted into bytes we often come into contact with, it is 480Mbps/s divided by 8 = 60MByte/s. The actual transmission speed is 20MByte/s.

USB2.0 transfer speed is about 40 times faster than USB1.1. Nowadays, most U disks also use USB2.0 technology. Since the capacity of U disks is getting larger and larger, it is difficult to transfer large files when transferring large files. The advantages of the USB2.0 interface are fully realized, so if you buy a USB flash drive now, you must choose one with the USB2.0 interface standard.

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