Hello new friend,
I’ve been pretty interested in this topic, and it’s my opinion that there are some people out there that can do this somewhat naturally, but skeptics say that they just internally do a lot of review. I dunno. I err on the side of not believing a lot in people with “supernatural” memories. However, thankfully, whether or not it’s something that some people are born with doesn’t matter a lot, since it’s a talent you can reasonably easily develop using the techniques around here. Here a are a couple useful threads:
Photographic Memory (not the same, but obviously related) largely considered to be false around here:
The oldest thread I’ve seen about remembering your life is this:
In that thread, Lembran Sar indeed goes on to write a blog that he’s kept up to date for over two years. So far, he’s lost no days, and remembers everything he did in all of those days, and has even recovered some earlier memories. He can effortlessly move between them. The reviews do start taking a toll after a while though, so he’s had some struggles. It’s a good blog.
My more recent thread about the topic:
It’s actually very straight forward to do. The human memory can easily handle this kind of task.