Assuming your iPhone 7 is kaput or lost, your data such as contacts, call history, photos will be lost. Therefore, it is necessary to make regular backups for your iPhone 7, so that you can recover the backup to your repaired or new iPhone. In this page, I will show you how to backup iPhone 7 to the computer using iTunes.
The steps below are presented on a Windows-based computer, and are identical on a Mac.
Step 1: Make sure the latest iTunes is installed on the Windows or Mac computer. An old version of iTunes may not identify the latest iPhone 7.
Step 2: Connect your iPhone 7 device to the computer using the included USB cable. If this is the first time you have connected your iPhone 7 to this computer, the iPhone device will pop up an alert asking whether you trust this computer. Tap Trust so that your iPhone 7 can be connected to the computer.
Step 3: Launch iTunes on the computer. iTunes will automatically and quickly detect the connected iPhone 7, and display the iPhone-like icon in its upper left corner.
Step 4: Select the iPhone-like icon to display the information of your iPhone 7. Click to highlight the Summary option on the left sidebar. Locate the Backups section on the right-side pane, select This computer, and then click Back Up Now.
Tips: The screenshot below is from iPhone 6s device, and is similar on iPhone 7.
The backup process will take a few minutes depending on how much data to be backed up. When the backup process is complete, you will have a full backup of your iPhone 7 on this computer. The backup includes nearly all of your iPhone’s data and settings, except contents from the iTunes and App store, and contents (such as MP3s, videos, books, and photos) synced from iTunes. You can restore the backup whenever you need.