Should I continue to wipe pornographic content from devices, even though I have become affected by it and practice masturbation because of it, or would I be sinful if I stopped doing so? And what should I do about the masturbation that I repeatedly practice and repent from? And is it better to wait until I actually stop practicing it to repent, or should I repent after each time?

Watching pornographic films and masturbation are forbidden, and one must immediately repent from them. If no one else knows about the evil or is unable to change it, then it is obligatory for you to remove it with your own hand as long as you are able to do so and it does not result in a greater harm. However, if removing the films requires watching any part of them, then it is not permissible, and you must advise your brother.