Why is the brain not detecting the USB?

The brain simply doesn’t detect a plugged in USB. Does anyone know how to fix this?

I am terribly sorry. I had tried 3 bad usb’s. Only after using a high quality one it worked.

oh

Cables - must be good for USB 3.0 2.0 data transfer rates.

Why? The brain uses micro-usb so it is only usb 2.0.

My bad… The point being do not buy the super cheap USB cables used for charging only.

Supposedly the charging only cables are a security feature. Means an infected computer can’t do anything to your phone or vice versa.

Just gets really confusing to know which is data and which is not data.