Find the file backup does not really mean that you already have the content of the backup. To protect your privacy and your personal data, the iTunes save iPhone backup as a type of SQLITEDB file, which does not allow anyone to access or pre-visualize the content directly. So you need a tool that allows you to extract the content of iTunes backup. What program? This is my recommendation: iPhone Data Recovery Tool. This program allows you to view all the details of the contents of your iTunes backup in just 2 steps.
This step by step guide is based on the Windows operating system (Windows 10 included). If you are a Mac user, the steps are the same.
Step 1. Select an iTunes backup and extract
iPhone Data Recovery offers three ways to recover data. To access and view files from iTunes backup you need to choose "Recover from iTunes backup files". Then you can see all your iTunes backup files that are on your computer. Choose the one you want to access and click on the "Start Scan" button.
Step 2. Preview and recover data from iTunes backup
When the scanning is complete, you can see many contained in the backup file, such as contacts, messages, photos, notes, call history, calendar and more. During the preview, you can select any item you want and save it to your computer by simply clicking on "Recover".
Tips: iPhone backup location on Windows XP/Vista/7/8 and Mac
Windows XP: C:\Documents and Settings\user\Application Data\Apple Computer\MobileSync\Backup
To quickly access the Application Data folder, click Start and select Run. Write "appdata" and click OK.
Windows Vista, Windows 7 and Windows 8: C:\Users\uer\AppData\Roaming\Apple Computer\MobileSync\Backup
To quickly access the AppData folder, click Start. In the search bar, type "appdata" and press Return.
Mac: ~/Library/Application Support/MobileSync/Backup/
The "~" represents the Startup folder. If you do not see AbeBooks your home folder, hold down Option and click the Go menu key.