Mine are just everywhere in my camera roll, so I try and recall the photos and events around the time I saved a particular meme or batch of memes. Or I try and recall an instance where I last used the one I’m looking for, and use the contextual clues to start my search. By chunking together context, other pictures, and memories of past uses, I can triangulate the approximate location of where the meme-of-interest might be.

Def not the best way lol but is prob what most ppl do intuitively - I too need a better system