Switching back from Icloud Photos

I wantes to go back from icloud photos (1200 Photos) to Iphone storage. (i have still 8 GB free on the phone) Icloud storage is about 4GB. used by Photos

When i switch off Photos in Icloud for this phone it tells me that i can store the photos from the Icloud .in original resolution; When i choose this option it tells me that 200 Photos cannot be stored on my iphone and will be deleted from the phone but still stored in Icloud.

As i calculate the Storage of the iphone cannot be the reason because even if i download 5 GB of Photos from the icloud , i still would have 3 GB free on my iphone. but it says th

I dont want to download 200 Photos from Icloud direct because then loose the time stamp. as i experienced.

So i iam looking for a solution to get back all my photos with time stamp to store them on Photos on my imac keeping icloud switched off.

Any help will be appreciated!