iCloud photos
When I try to turn on my iCloud photos on my iPhone it keeps coming up with a message which is “photos synced with finder will be removed 4,425 photos will be removed” then it gives me an option to remove the photos and turn on iCloud photos or cancel and not to start iCloud photos, what shall I do and if I turn iCloud photos will all my pictures be removed?
iPhone 12 Pro, iOS 15