USB drive not recognized
To make Widows recognize a USB drive (and you have already tried different USB ports) right click My Computer > Manage > Disk Management > find the drive on the right with no drive letter and right click it to give it a drive letter.
To enable / disable autoplay for USB, right click a USB device when it is plugged and select properties > AutoPlay tab
Choose either "Select an action to perform: or Prompt me each time to choose an action
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