There are a few different ways to back up and sync your files on a Mac. You can use iCloud, Time Machine, or a third-party service.
iCloudis Apple’s built-in backup and sync service. It stores your files in the cloud, so you can access them from any device. iCloudis free for up to 5GB of storage, and you can buy more storage if you need it.
Time Machine is Apple’s backup software. It backs up your files to an external …