I do a frequent manual backup (drag and drop) of a Libre Office Calc document (from HD1 to HD2) - This invokes a "Would you like to replace the existing file ..... with this one ..... " dialog box, to which I hit yes. I noticed today it specified the size of the old version as 2kb larger than the new version. That doesn't make sense as I only add to the file. Any ideas/suggestions why I'd see this?