India, Oct. 16 -- There is a particular frustration familiar to anyone who has spent time on Instagram. You come across a video you want to keep - a recipe, a workout, a moment from a creator you follow - you save it, and weeks later you go looking for it. It is gone. Not because you unsaved it. Because the post no longer exists.

This is not a bug. It is an outcome of how Instagram's save feature actually works, and it is one that millions of Indian users have now encountered often enough to change how they handle content they want to hold onto. Rather than saving inside the app, they are downloading. Rather than trusting Instagram's bookmark system, they are keeping local copies of the files themselves.

Most Instagram users do not know...