How does Optimize iPhone Storage work?

morgan_199 wrote:

When you go into your settings and turn on “Optimize iPhone Storage” does that automatically reduce the file size of all the photos you previously took before turning it on or does it only affect the photos you take after you turn the iCloud option on? I tried doing this a long time ago and nothing happened but this time I had it turned it on for some reason and I noticed my storage amount i had left increased by a lot. Is there supposed to be a significant difference in the quality of the smaller image sizes to where you can’t upload them because I don’t notice a huge difference in my photos. When you switch to “Download and Keep Orginals” do they all go back to their original sizes or do you still have to download them from iCloud?

Keep in mind... your photos are only optimized if "needed". If you have lots of storage on the phone, your photos may not yet be actually optimized. You don't get to control this configuration.