Colin, bear with me please, I know you are trying your best but you need to read all of our messages slowly and carefully. I do not mean to be arrogant and if I appear that way, I apologize, my only desire is to help you. King told you correctly above about the location of the file (you can only get there by unhiding hidden files or going by way of %appdata%). However I had given you the same information on my screenshots before, the path to the proper location was shown there, don't know why you placed it on the iTunes folder.
Regarding your music, films, apps, etc. King mentioned that they would not be included in the actual backup but there is something you can do to have at least the apps stored and maintained current in your iTunes library and maybe all other. Please see the screenshot below (this one is from my Mac but Windows will be the same). Go to iTunes, Preferences, Store and put a check mark next to Apps (and any other you wish). From that point forward iTunes will keep a current copy of your Apps in the computer ready to use during a restore.
Cheers and good luck... 🙂
