Storage Doubled After Downloading From Google Photos To iPhone
I switched from Android to iPhone back in 2022 and transferred my photos and videos using Google Photos. After downloading everything on my Google Photos to my iPhone, the storage occupied by the photos doubled (from about 90GB on my Google Photos to 180GB on my iPhone storage). At first I thought it might take some time for iPhone/iCloud to process these photos and some cache is needed.
A year later, I checked my iPad and noticed that the same thing happened on my iPad (even though the pics on my iPad are not from Google Photos but synced with my iPhone through iClouds).
So in short, the problem is that the same set of photos and videos occupy around 100GB on my Google Photos but 200GB on my iClouds/iPhone/iPad Storage. I am sure that both are set to original quality mode and no duplicates are found in the albums.
iPhone 14 Pro, iOS 16