That is the point of step 3 in my advice. It takes a snapshot of all of the settings and data for each app and backs them up. The media files themselves aren't included in the backup. When you restore all your app data goes back on first along with the apps, and the media is added last.
There is another benefit to going through these steps. As a rule you only have a single rolling backup for each device. These become archived when a device is restored and a new rolling backup is generated. Running a backup restore cycle periodically gives you a chance to go recover an earlier state of the device following some incident when the current backup has been updated after losing the data that you want to restore.
tt2