Back up your Mac with Time Machine
Can you backup your Mac without an external hard drive?
3. How to Backup Files to External Hard Drive
Next, do the following:
Summary: In today's scenario, backup iCloud on external hard drive is an effective way to free up your storage space. However, managing storage on your iCloud can be tricky if you have limited space.
Check Apple's Disk Utility to see if an external drive is showing up. Disk Utility is within System Preferences, or you can find it using Spotlight. If it is visible, then click the option to Mount, which should make it visible on the desktop and in the External Drives option in the Finder menu.
Go to Photos app > Select the photos you want to transfer > Tap the Share button in the bottom left corner. Step 4. You can tap the Options to select your photo options > If everything is OK, tap the Save to Files > Choose your external hard drive as the destination > Tap Save.
How to backup your Mac to iCloud
Any drive formatted with HFS+ will work just fine with a Mac that's running High Sierra or later. Neither Apple File System nor HFS+ works with Windows, however. If you plan to use your external drive with computers that run both operating systems, you should consider formatting your drive with the exFAT file system.
Backing up your Mac on a regular basis is one of the best things you can do. Through the use of Time Machine and an external hard drive, we're going to break down the full process to help you keep your files safe. Millions of people flock to buy a Mac because of its beautiful design and superb operating system.
Plug the hard drive into the Mac using the cable that came with it. Most hard drives connect via USB, so you'll just need to plug the USB cable into an open port on your Mac. You'll typically find at least one USB port along each side of the Mac.
The best way to know for sure if a file on your external hard drive is being backed up online, is to sign in to the site and click "View/Restore Files". Another option is to view the "Files Scheduled for Backup" log in the settings panel.