When you first set-up iTunes it will ask you to choose a location to save this software to. By default this location is usually set to the users section of the main drive, for example: C:\\Users\John\AppData\Roaming\AppleComputer\MobileSync\Backup
Make sure that you have hidden files showing if you are looking for your iTunes backup in the default location. Your backup file might not be showing if you have selected somewhere else to install iTunes, or if you save your iTunes backup files to a different location than the default option.
If you can’t find your iTunes backup in the users section of your main drive you can try searching for the folder 'AppleComputer', which will allow you to find the location of your iTunes backup.
If you are still struggling to find your iTunes backup file you can contact our support team on [email protected] who will help you troubleshoot and find your files. We’re here for you 24/7 so you never have to worry about lost or deleted data again.