I've got the steps to change the backup settings in QuickBooks Desktop, what7.

If you are referring to your local backup, you can accomplish the task by following the steps below: 

1. Go to File and hover over Back up Company. Then select Create Local Backup.
2. Select Options.
3. Make changes, then select OK.

For more details, refer to this article: Back up your QuickBooks Desktop company file.

If it's for online backup, the steps are as follows:

1. Open Intuit Data Protect.
2. Select Change backup settings.
3. On the Select QuickBooks Data window, choose the files you want to backup, then select Continue. Note: For Entire PC Users, after you choose Continue, select the additional folders you want to back up on the Select other folders to back up window.
4. Click Continue. On the Notifications Email Settings window, choose whether to be notified or not.
5. Tap Continue again, then choose your backup time.
6. Select Continue to save the changes, then exit from the settings window.

Once everything is all set, you can restore your company file in QBDT. 

If you encounter difficulties while attempting to restore your backup file, you can use this article to help you fix them: Fix backup company file issues in QuickBooks Desktop.

I'll always be around if you need more help changing your scheduled backup settings or any other issues.