Because my phone's not rooted, there are hundreds of files on my phone i don't 'own'. I can't access them, in many cases I can't even see them. My phone tells m

Because my phone's not rooted, there are hundreds of files on my phone i don't 'own'. I can't access them, in many cases I can't even see them. My phone tells me i don't have permission. If they were.kine, i could do whatever i like with them.The OS and apps on my phone can access them though, modify them, delete them. WhatsApp for example can delete pictures and messages from my phone at the whim of the person that sent them, if left in the default folder.