You have to activate the Developer options. You do that by going to the About phone setting. Then you tap 7 times on Build number. This turns on Developer options. Then go the Developer options and change the USB configuration from charging to MTP. This should allow your computer to recognize the phone.
Hanjor, being able to sync your information with multiple devices is a great way to protect your content. What specifically are you trying to share between your devices? Are you getting an error message when you plug your phone up to your computer?
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