Usb device not Working, Not Detecting. My phone usb access not working

Well try the following:

• Try a different USB cable – Many phone charging cables don’t support data transfer, only charging. Use an original cable if possible.
• Try another USB port – Use a port directly on the PC, not through a hub.
• Test on another PC/laptop – This tells if the issue is with your phone or your computer.
• Check phone screen – When you connect, it may ask to choose:
  • Charging only
  • File Transfer (MTP)
  • Photo Transfer (PTP)
    Make sure you select File Transfer.