Perhaps these days almost all of us are well aware of flash drives and use them a lot for files transfers from one PC to another or sometimes use them to listen music or videos stored on the flash drives. But sometimes the excess use of these flash drives from one PC to another results into infection with some rare viruses which cause them to malfunction like folders missing, capacity shown less or sometime we even can't format it! The reason for such a problem a virus residing in the flash drive makes the system busy so from windows environment it becomes hard to format it or access it properly. So below is the simple DOS command thru which you can easily format a flash drive
Click or Search for Run.
Type Cmd & press Enter
Type the following command line
NOTE: Here G: refers to your removable disk drive letter.
I Also strongly recommend HP USB Disk Storage Format Tool 2.2.3