[quote:6368a7693b="atmega64"]Do not take me for a fool ....[/quote:6368a7693b]
I think your comment is inappropriate, as several members tried to help.
Further, someone having no clue about of what he's doing is not automatically a fool, but at least one can read from your comments, that you don't have any clue.
I believe you expect some pre-made copy/paste code - but that's expected wrong.
[quote:6368a7693b]I must, of necessity, use a PenDriveUSB, formatted FAT32 ...
Please I need a valid way to follow ... [/quote:6368a7693b]
A definite way to get exactly what you want, is to use a Vinculum VNC1L, it implements an USB-host, and that's what's needed to connect an USB-stick ro an µC.
The VNC1 has the ability to do file-management, create files, rename, all the stuff.
Create a file with 5 numbers file name, or create a file that holds said 5 numbers, maybe encrypted in some way, and you're done.
But no pre-made code there either, and that's the moment where one needs a clue, read data sheets, implement the protocol, all that sort of stuff.
In two words: forget it.
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