Clip won't boot and I can't copy system files to it

Sorry DFELD2005, I’m using Windows 7. And the removal of files on this Clip probably happened several months ago when I was trying to get the audiobook sequencing problem sorted out on it. (I have three Clips purchased many years ago, and your help earlier this week on the sequencing issue solved the problem with the other two Clips; this blue Clip was “new” and I can’t imagine how I could have been so stupid as to have deleted its operating system. But I could copy the OS from one of the other Clips if the blue Clip would allow me to write files to it.