That tool makes false claims, it's a piece of junk software which does not (and cannot) do what it claims to do.
Buy a larger capacity pen drive instead of trying to save money by using useless software.
I mean, come on now, pen drives don't cost very much do they!
I could understand you trying something like SData if pen drives cost a lot of money, but they don't.
If you know what a "rip off" is, SData is a good example.
It reminds me of those so called "RAM doublers" from the 1990's. They were a rip-off too.