iCloud is the easiest way to make sure all your important content is everywhere you are. iCloud stores your documents, photos, music, apps, contacts, and calendars, so you can access them anytime you’re connected to the web.
You can use your Set up Family Sharing.
Note: If your iMac has multiple user accounts, only one can have Find My Mac turned on.
Learn more. See What is iCloud? in the macOS User Guide.