Eidetic memory is vastly different from a memory aid/trick (and click bait). People with eidetic memory are quite literally biologically superior to the rest of us. While the TV series "Suits" is a fiction it isn't far from reality: my late grandmother had an eidetic memory and while she did not have the full range of abilities as the protagonist, she was able to recall any page of a book after rifling through it.
What is still up to debate is whether memories/knowledge can be electronically injected into our minds. I would say it is highly plausible at some distant point in the future, we are already coming to terms with electronically reading our minds.
