Edit: could be as much as 5-7 gigs worth of stuff, not "crap" because it got there for some whatever reason, but it's all just too much anymore.
It happens to all of us.
I recently DBan-ed and reformatted five almost fully loaded external hard drives which have been sitting on a shelf, unexamined and untouched, for over three years now.
It took a bit of "what the hell" to nuke approximately 1TB worth of "stuff" since I'm an info squirrel by nature. But I figured if I hadn't needed or missed any what was on them in over three years, it wasn't anything critical to my current life.
Once the initial wave of anxiety passed, I suddenly felt a sense of...I dunno...maybe something akin to liberation?
Maybe I lost something nuking those drives I'd rather I hadn't. But if so, I've already forgotten what it was.
And if I ever do remember, then at least I can say "Well, since it's already happened, it's one less thing to worry about."
Next step: going through and optionally purging those 200+ apps I have loaded on my iPhone - half of which I don't even know what they do any more. Bet when I'm done there'll be fewer than 30 remaining.