I'm really confused with these two features: iTunes Photo Sync and Photos App (on macOS).
I just want to keep my photos synced between my iPhone and MacBook. So if it is possible, every time I connect my phone via USB (or over WiFi) newest photos get copied from iPhone to mac and vise-versa.
What can I do? How to keep photos synced without uploading them to Apple servers? (aka iCould Photo Library)
I use Import feature of Photos app on macOS, it copied all photos from iPhone. But some minutes later, iTunes copied all downloaded photos from my mac to iPhone again! So I had duplicated photos on iPhone.
Note that I'm using macOS 10.12.6 and iOS 11.