iCloud
is it possible not to automatically transfer all data from iCloud between my apple device
See: Change your iCloud feature settings [iOS and Mac] - https://support.apple.com/HT207689
- "'When you turn off an iCloud feature on a device, information stored only in iCloud for that feature is no longer available on the device. If you turn off Mail, Contacts, Calendars, Notes, Reminders, or iCloud Photos on just one device, you can still view and change your information on iCloud.com and on another device you set up for that feature."