When I go to open a .ods or .xlsx file, Proton Drive creates an entirely new file and then opens that file to edit. This then abandons the .ods or .xlsx file and all new edits only show on the newly created file that opened in Sheets. This is inconvenient when some of my editing is being done on Proton Sheets and some on Libre Office Calc or Microsoft Excel. As a small business manager, we cannot adopt Proton Sheets in part for this reason.