computer is not detecting a second monitor

i have a dell windows 10. plugged in the usb 2.0 uga and the second monitor is mirroring. i need to set it as a second-)but my settings are not detecting anything. help is greatly appreciated, please

It sounds like you just need to set up your display space. If you open up Display Settings, select the second monitor, do you have the option to extend in the multiple monitors section of that window?