LibreOffice can create a backup copy when you enable it in settings (Options > Load/Save > General), but it saves only the previous state (one only). It has also an versioning feature (File -> ...
is there an equivalent macro/vba in libre calc that does this routine; - Read/open xls files in a path and do a batch import/copy of read sheets and merge it with the current open workbook. Here's the ...
Invoking LibreOffice and running a macro via the GUI works as expected producing three HTML files, one for each spreadsheet page: $ libreoffice x.ods Tools>Macros>Run Macros... Library: ...