Hi Di,

When you rename an Excel file that is linked to another Excel sheet, the link between the two files gets broken. This can cause errors in your formulas and data. However, you can easily update the links to the new file name by following these steps:

1. Open the Excel file that contains the links.
2. Click on the "Data" tab in the ribbon.
3. Click on "Edit Links" in the "Connections" group.
4. In the "Edit Links" dialog box, select the link that you want to update.
5. Click on "Change Source" and browse to the new file name.
6. Select the new file and click "Open".
7. Click "OK" to close the "Edit Links" dialog box.

This will update the link to the new file name and your formulas and data should work correctly. If you want to disable the links completely, you can break the links by following these steps:

1. Open the Excel file that contains the links.
2. Click on the "Data" tab in the ribbon.
3. Click on "Edit Links" in the "Connections" group.
4. In the "Edit Links" dialog box, select the link that you want to break.
5. Click on "Break Link" and then click "OK" to confirm.

This will break the link between the two files and your formulas and data will no longer be linked. However, be aware that breaking links may cause errors in your formulas and data if they were relying on the linked data.