Dumb question about downloading

Just thought I’d ask, as I haven’t tried it, but say you have the Emby app and the Symfonium app on your phone. Say you download music to your Emby app. Say you download music to your Symfonium app. If you download the same music, does that mean you’ll have two copies of those songs on your phone, or might Symfonium know, that’s there already, don’t need to download it again…

You’ll have 2 copies of the media, there would be some major security concerns if any app could access any other app cache.

Fair enough. Thanks for your (very rapid) reply.