It's not a Windows' file copying issue.  My returns were split using ProSeries without touching anything outside of ProSeries.  This is a ProSeries issue and not a Windows issue.  Lately Intuit seems to have developed a nasty habit of blaming their issues on everything but themselves.  And the good news isn't that there is a fix coming for TY22.  The good news would be that you have a fix for TY21.  And finally, why in the world should someone have to pay Intuit a fee because of an Intuit screwup?  That is the most ridiculous thing I have seen in a long time.