USB2.0 how to improve transmission speed

Is it usb3.0 to see the speed of the gods of others? Have you complained about the speed of your USB2.0? In fact usb2.0 the theoretical speed is 60mb/s, but most cases usb2.0 the highest actual transmission speed only 30mb/s, That is because USB2.0 uses the serial transmission mode of NRZI encoding, transmission of continuous 0, 1 strings, in the transfer process requires frequent forced insertion of 0 to keep the sending and receiving end of the frequency synchronization, resulting in a waste of USB 2.0 transmission bandwidth. In addition, the USB2.0 uses a traditional bot protocol that restricts chunks under the operating system to a maximum of 64KB, while a continuous chunk size of 128kb,bot blocks will waste a lot of waiting time because of serial processing. Under the double restriction of NRZI and bot, the effective transmission bandwidth of USB2.0 can be left about 50%. The next small to teach everyone to raise the transmission speed of USB2.0.

1, go to the Microsoft Official website windows6.1-kb2581464 upgrade patch

2, unzip the installation, and then restart the system according to the prompts.

3. After rebooting the system, we need to make sure that the usb2.0 is plugged into the computer and then manually add the INF information of the USB peripherals. Right click on the computer, go to "properties → Device Manager → disk drive" to find your USB flash drive, right-click it into the Properties window of the detailed information interface.

4. Select "Details" and select "Parent" in the drop-down menu of the properties.

5. A string of characters appears in the Value dialog box. where "Vid_xxxx&pid_xxxx" is the USB2.0 storage device unique INF device identity, the INF device identifier of the U disk is "xxxx (after VID) xxxx (PID)".

6. Enter regedit in the Run window of the Start menu, and then expand "Hkey_local_machinesystemcurrentcontrolsetcontrolusbstor". Under Usbstor, create a new "xxxx (after vid) xxxx (after PID)" entry.

7. Right-click on the right side of the window to create a new DWORD value named "Maximumtransferlength", then double-click on it and change the decimal value to "2097120"

Note: Be sure to restart after the effect. If you have a lot of USB devices that you need to use frequently (such as a USB flash drive, a mobile hard disk, or even a mobile phone), you can add their INF device ID to the registry to add to the Usbstor.sys, don't be afraid of the trouble, this can be once and for all the wonderful trick oh.