iTunes for Windows stores the local backups of your iPhone, iPad, and iPod touch in the following folder: \Users\(username)\AppData\Apple Computer\MobileSync\Backup\
Follow these steps to open the folder:
Step One
Using the search bar input the following address and hit Enter.
%appdata%\Apple Computer\MobileSync\Backup
To locate the search bar click Start in Windows Vista or Windows 7, click the magnifying glass in the top right corner if you are using Windows 8, and click the search bar to the right of the Start button in Windows 10.
Step Two
Windows will open the folder with all your backups.
Follow these steps to open the folder:
Step One
Using the search bar input the following address and hit Enter.
%appdata%\Apple Computer\MobileSync\Backup
To locate the search bar click Start in Windows Vista or Windows 7, click the magnifying glass in the top right corner if you are using Windows 8, and click the search bar to the right of the Start button in Windows 10.
Step Two
Windows will open the folder with all your backups.