Put "diskmgmt.msc" without the quotes in the run command box and press ok. Have a look in there if the flash drive has any unallocated space.

its only 2gbi shouldnt really worry about it lol
Did you recently buy it? I know this answer is very "un technical", but maybe it's a dud... and it's not 4GB?
That's very strange, it may very well be a dud.
PSN: StefanWolves
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