|Only thing I can think of is to copy the file onto the hard disk and then try dragging it into an open Excel page.|
Note that an SHS scrap file is not a complete document but "part of a document". I can only imagine that you dragged it onto the flash drive from an open Excel page rather than dragging the file itself. SHS is not a normal application file like xls or doc. So even if you manage to drag it into an Excel file you will not have the full document.
I don't know the full background to this. Has the complete original file been deleted from wherever it was because this dragging should have left it in situ?
Always pop back and let us know the outcome - thanks