If you encounter this situation, you can solve it in the following two ways:

1. How to turn off XHCI Mode: Turn on the computer and enter the BOIS settings, find →XHCI Mode under USB related controls, and set the option to off. If you don’t know how to do it, you can search for your own 'computer motherboard model + turn off XHCI' to find information

2. You can buy a PCI-E to USB-2.0 independent power supply expansion card and insert it into the motherboard card slot. The PCIE card has its own USB controller, which can increase the number of recognized mobile phones and solve the problem of insufficient USB controller resources. Another way is to change the BOIS settings and turn off XHCI Mode (not all motherboards support it).

If the above two methods still do not solve the problem and you really need to connect so many peripherals, please replace the mainboard.

In theory, each motherboard is developed based on 127 addresses, but motherboard manufacturers consider the usage scenarios of most users (about 10 external USB devices) and will not open all these addresses. They will leave a certain margin. This setting can make the operation of the computer host more secure. Therefore, the number of USB addresses opened by each motherboard manufacturer is different, and the number of external USB devices supported is also different.