How to use ITunes to delete a backup file
If you're using an iTunes backup, the backup file is stored somewhere on your computer. Go to the folder? No, we delete this backup file directly from ITunes.
First step: Start the ITunes application.
Step two: Go to ITunes's "preferences".
Step three: Select the Devices tab at the top of the preferences.
Now you will see all the backup files that have been stored on your computer.
Step Fourth: Select the backup file that you want to delete.
Note: In this step you can select multiple backup files one at a time by holding down the "command" key while using the mouse.
Fifth step: Click the "Delete Backup" button. You will see the following one to confirm the deletion of the Backup window and click the "Delete" button at the bottom right to confirm the deletion.
These backup files have been removed from your computer at this time.