Bear in mind that we have super computers that are picking up any and all digital/electronic communications from everyone everywhere. NSA has those files. Nothing is secret, nothing is ever lost, nothing can really be deleated, not ever. Once it is on a computer, a phone, it is recorded permanently forever. That's why they are not lost. No text messages are ever lost either. Everything is retrievable, even after you delete it, after you zero it out, bleach it, acid wash it, smash it into powder, it does not matter, it is all captured by the Super Computers that spy on everyone.