https://techcommunity.microsoft.com/discussions/sharepoint_general/large-powerpoint-file-size-when-creating-persentation-in-ppt-online/3811241
Large PowerPoint file size when creating persentation in ppt online | Microsoft Community Hub
When creating Powerpoint files in SharePoint online, the file size will show in Storage Metrics as several GB, but in Finder will show as several MB.To...