Plug the flash drive into one of the USB ports.Go to file Explorer, My computer or any file Manager (e.g. Total Commander). Locate disk flash drive and click the right mouse button. In the opened context menu select "Format...".
Set the desired formatting options (capacity, file system type, volume label, format method and press Start. Wait for the formatting process. Its duration depends on the selected settings and the volume of the flash drive.
Before formatting, make sure that no other application does not use flash, otherwise format it will not work.