weird usb problem

QuestinMarks

Reputable
Apr 15, 2014
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i recently found a usb i lost.
here's the problem, for some reason it only has less than 4mb space left.
there are only 2gb of data in it.

and i if the files were hidden, i would have seen them since i put show hidden files on.

what could be the cause of this.
are there actual files that i can't access?