I download memes you share with me on this website. I intend to share them in real life.
But if they're juicy enough, they disappear from my phone overnight.
I had one saved the day before yesterday, I showed it to the psychiatrist who said I was paranoid-delusional, yesterday, to prove him wrong. It was a graph of trust versus homogeneity, and I titled it DiversityIsOurStrength.jpeg. Now it's gone.
I also found some JPEGs of LEGO diagrams and saved them for a project, from a front page Google result. Thos JPEGs went missing and can no longer be found with any search engine.
These things are happening. Beware.