Your contacts are being synced with your iPhone over the air from iCloud.
Over-the-air- sync settings can be changed on your iPhone.
Your calendars are being synced with your iPhone over the air from iCloud.
Over-the-air sync settings an be changed on your iPhone.
You must disable iCloud backups for the particular info you are trying to backup locally to your machine. I don’t use iCloud and always keep my backups local to my computer. To turn off iCloud or turn off iCloud settings follow the directions below.
Go to Settings -> iCloud
Afterwards, you can backup and sync contacts and more in iTunes.