Auto save is not enabled prompt every time.

The yellow AutoSave bar usually appears when you have AutoSave disabled in Word, but the document is stored on OneDrive or SharePoint.

Disable AutoSave for OneDrive/SharePoint Documents

Open Word.

Click on File in the top menu and choose Options.

In the Word Options window, go to the Save tab.

Uncheck AutoSave OneDrive and SharePoint Online files by default on Word.

This should stop the yellow bar from appearing when you open documents stored on OneDrive or SharePoint.

If you don't want AutoSave to be enabled but still want to stop the yellow bar, unfortunately, there's no specific setting just to suppress that exact warning. However, by turning off AutoSave, it should minimize such interruptions.

This warning pops up when Excel detects that the workbook might have performance issues (such as too many formulas, large data sets, or complex calculations). You can disable it as follows:

Disable the Warning in Excel

Open Excel.

Click on File and choose Options.

In the Excel Options window, go to the Advanced tab.

Scroll down to the General section.

Uncheck the box that says Show this message when this workbook is opened under Performance.

This should stop the annoying prompt that your workbook might be slow. Keep in mind that Excel will still provide performance alerts for very large or complex workbooks, but this specific prompt should be disabled.

While both of these settings should help you eliminate the annoying prompts, they’re there for a reason—AutoSave is intended to prevent data loss, and Excel warns about performance to help you understand potential issues. That said, if you’re comfortable managing these features on your own, disabling them is totally your choice!

My answers are voluntary and without guarantee!

Hope this will help you.