can you copy File with Explorer to USB-Stick
![Question :?:](./images/smilies/icon_question.gif)
if yes you might have a look at ShFileOperation() which "is" the "copy" Part of Explorer
https://docs.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-shfileoperationa
have a look at x:\fwh\samples\dlgfile.prg