There is a simple way to recover the missed space on your pen drive with Windows built-in utility Diskpart. If your pen drive somehow is showing only 4MB space, do not worry. Writing operating system (OS) like Linux to the pen drive. Unplugging the pen drive suddenly when it is in use. There are many reasons that can lead to a pen drive showing less space than actual.
Besides 16GB, pen drive with less or more capacity may also loss a large amount of space after unexpected changes made intentionally or not. The often met problem with pen drves is that an USB pen drive 16GB shows 4MB. Pen drives are very convenient for data storage, but they can be damaged easily.
