The app has 3 ways to upload new pictures, one of them is the "custom picker". The custom picker has an activity that shows a list of folders:  The present issue is about that custom picker's folders list activity. The idea is to implement long-press on a folder to reveal a menu offering folder operations: Phase 1: - Open the folder in another app (just launch an intent, Android should hopefully suggest available file explorers and gallery apps). Phase 2: - Mark all pictures currently in this folder as "Not for upload". Phase 3: - Always ignore this folder (which makes it greyed out, with 🚫 overlay icon, shown at the end next time the picker is opened) - Un-ignore if the folder if it is the "Ignored" state.