You may want to free up some space on your iPhone and happen to see this article when searching the internet. If so, you have found the right help. Did your songs and videos keep coming back? Do you want to delete the content permanently so that no one can see them? To simply get rid of the some junk files for more storage space, you should uncheck the box "Automatically include", find and delete them in the iTunes-folder on your PC. Finally, when you sync your iPhone, the annoying things should be gone.
But, this is not a thorough way to clear music and movies from iTunes if you want your privacy protected. It is highly recommended that you download iPhone Data Eraser, which is an excellent tool for data erasure. (Still, ticking off "Automatically include" is the first thing you do.)
Note: You may want to do a backup first for the original data will be overwritten and can not be retrieved.
Step 1.Connect Your iPhone to PC
When you see this interface which says "Failed to connect", go to your iDevice and tap "Trust". (It means that your files on the phone will be accessible from this computer. Of course, if you don’t own the machine, "Don’t Trust" may be a choice. But, once you do that, connection would fail.)
Step 2.Confirm to Delete iPhone Data
See that blue section? Choose the last mode "Erase All Data" and you should see this. Three things should be done. The first one is that you must make sure that no background apps are running and no updates are undergoing. The second thing is to select a security level. (Or, you can set it by default.) The last one is to enter the word "delete" in the box and press the button "Erase Now".
Step 3.Erase iPhone Music and Movies Forever
In this step, you don’t have to do anything actually. But, if you care to know, here are some details of the process. The step is separated into three parts-the first one being cleaning up the files, the second one restarting and the last one overwriting the old data. You will know how far it has gone by the interface.
At the end, I would like to mention that you can do this for free as it is the function of a free version. And, if you want to delete other iPhone data, check out our website. Hope you like iPhone Data Eraser.