Every time you sync your iPhone with iTunes, a backup of your smartphone is created. Backups allow you to restore the iPhone to its previous settings after you have reformatted and reset the device to its factory defaults. Only one backup per device is stored on your computer and unless you actually search for the backup, there's no way you can be sure that it exists. Whether you just want peace of mind or you'd like to copy a particular backup file to another location for safekeeping, you can view the backups stored on your machine.
Click the Windows "Start" button on your computer desktop.
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Click on the right side of the menu that appears. The "Computer" window opens.
Locate and double-click your primary hard drive. Typically, this is listed as "Local Disk (C:)" under the "Hard Disk Drives" heading.
Double-click the name of your user account folder.
Double-click the "AppData" folder. If the folder is not visible, click "Tools" in the Menu toolbar in the upper left corner of the window, then click "Folder Options." The Folder Options dialog box opens.
Select the "View" tab. Click to select "Show hidden files and folders," which appears under "Hidden files and folders." Click "Apply" and "OK." The AppData folder should now be visible. Double-click the folder.
Double-click "Apple Computer."
Double-click "Backup." The backups of your iPhone are displayed.