@Nyarry Mus,
You don’t say what is wrong with the USB connection in your TV, so here’s a link to the [https://www.lg.com/ae/support/support-product/lg-32LN5100-TA|user manual] that details how to use the USB port (p.28) and also the remote control (p.23) to access the USB functions etc.
Scroll down to ''Owner’s manual'' and click on the language link that suits you.
If your USB device is not being detected, plug in a USB mouse and see if the mouse laser light turns on, indicating that the USB port is supplying power to the device. If not there may be a problem with the port.