To keep from consuming too much disk or memory space, Microsoft 365 SharePoint puts some file size limits on the files or workbooks you can upload and work with online. When you upload an Excel for the web workbook to a SharePoint document library that's too large, it will either not open in a browser window, or let you edit or refresh data in the browser.
Microsoft SharePoint has some file size limits for workbooks. Excel for the web SharePoint in Microsoft 365 More.
