This is only possible if you are using a PC after a long time. then you will have to get the previous Port fixed from the service center or a technician Try another USB port or another computer. Power Surges can cause USB ports on your motherboard to malfunction. You can choose to format your USB Drive in your PC if you do not require the data within or copy the data in the original PC first and then format it in your PC.
This can happen only if your USB disk was formatted in a different PC and used in your PC for the first time after the format
