Mac has two built-in backup tools, and you should use both

Time Machine is macOS's automatic backup system. It runs in the background, saves every version of every file you change, and lets you recover a single document or your entire drive. iCloud Drive syncs your files to Apple's servers so you can reach them from any device and recover them if your Mac fails. Together, they cover different needs: Time Machine protects you against accidental deletion and hardware failure; iCloud Drive protects you against losing your Mac entirely.

Most people should set up Time Machine first — it takes five minutes and then works without thinking about it. If you use iCloud Drive or want a second copy somewhere else, add that after. The goal is not to have one perfect backup, but to have a backup you will actually use when something goes wrong.

Key Takeaways

  • Time Machine backs up your entire Mac automatically to an external drive, and you can restore individual files or your whole system from any point in time.
  • You need an external hard drive or SSD larger than your Mac's storage, and Time Machine will erase it the first time you connect it.
  • iCloud Drive syncs files to Apple's servers and works across your devices, but you pay for storage above 5 GB and it does not back up your entire Mac.
  • The fastest way to recover from a failed Mac is a Time Machine backup; the fastest way to recover a single deleted file is often iCloud Drive's version history.
  • External drives fail, so if Time Machine is your only backup, add iCloud Drive or a second external drive for files you cannot afford to lose.

Setting up Time Machine with an external drive

Plug an external hard drive or SSD into your Mac. If the drive is new or contains files you want to keep, back those files up first — Time Machine will erase the entire drive when you set it up. If the drive is empty or you do not need what is on it, proceed.

Open System Settings (or System Preferences on older Macs). Click General, then Time Machine. Click "Add Backup Disk" and select your external drive from the list. Time Machine will ask for permission to erase the drive — confirm. The first backup can take hours depending on how much data you have; subsequent backups run in the background and take minutes.

Leave the drive plugged in, or plug it in regularly — Time Machine works best when it can back up at least once a day. If you unplug it for weeks, you will have a gap in your backup history. Most people keep the drive plugged in at their desk or plug it in once a week.

Restoring files from Time Machine

If you delete a file by accident, open the folder where it was. Click the Time Machine icon in the menu bar (top right of your screen) and select "Enter Time Machine." You will see your folder as it looked at different points in time, with a timeline on the right. Click backward through dates until you see the file you want, select it, and click Restore. The file returns to its original location.

If your Mac stops working and you need to restore everything, you will do this during setup on a new Mac or a fresh installation of macOS. Time Machine will offer to restore your entire system — applications, settings, files, everything — from your backup drive. This takes an hour or more depending on how much data you have, but your Mac will be exactly as it was.

Using iCloud Drive as a second layer

iCloud Drive syncs files to Apple's servers and makes them available on your iPhone, iPad, and other Macs. Open System Settings, click your name at the top, then iCloud. Toggle iCloud Drive on. Choose which folders to sync — you can sync your entire Documents and Desktop folders, or pick specific folders.

iCloud Drive is not a full backup of your Mac the way Time Machine is. It backs up only the files you choose to sync. But it protects you if your external drive fails, and it lets you recover deleted files through iCloud.com. If you delete a file, you have 30 days to recover it from iCloud.com before it is gone for good.

Apple gives you 5 GB free. If you sync your Documents and Desktop folders, you will likely need to pay for more storage — 50 GB costs $0.99 per month, 200 GB costs $2.99 per month, and 2 TB costs $9.99 per month. The cost is per Apple ID, not per device, so if you have a family group, you can share a plan.

Choosing an external drive for Time Machine

You need a drive larger than your Mac's storage. If your Mac has 256 GB of storage, get a drive with at least 500 GB or 1 TB. Larger is better because Time Machine keeps multiple versions of your files, and a bigger drive means more history.

Any external hard drive or SSD works with Time Machine. Hard drives are cheaper — a 2 TB external drive costs $50 to $80. SSDs are faster and more durable — a 2 TB external SSD costs $150 to $250. For most people, a hard drive is fine. If you move the drive around or want faster backups, an SSD is worth the extra cost.

Do not use the same external drive for both Time Machine and storing other files. Time Machine needs the entire drive, and mixing backups with your own files makes it harder to manage. If you want to store files on an external drive, use a second drive for Time Machine.

What to do if your backup drive fails

External drives fail eventually. If your Time Machine drive stops working, you lose all the backups on it, but you still have your current files on your Mac. Buy a new external drive, plug it in, and set up Time Machine again. From that point forward, you have backups again.

This is why you should not rely on Time Machine alone. If your Mac fails before you can replace the Time Machine drive, you lose everything. Add iCloud Drive, or keep a second external drive with a copy of your important files. You do not need to back up everything twice — just the files you cannot afford to lose.

Backing up to a second external drive instead of iCloud

If you do not want to pay for iCloud storage, you can use a second external drive. Plug it in, open Finder, and drag your important folders to it. You can do this manually once a month, or use a free tool like Carbon Copy Cloner or Duplicati to automate it.

This approach is slower than iCloud — you have to plug in the drive and wait for the copy to finish. But it costs nothing beyond the drive itself, and you keep complete control of your files. Many people use this method for their Documents and Photos folders while keeping Time Machine as their main backup.

Frequently Asked Questions

Can I use the same external drive for Time Machine and storing other files?

No. Time Machine needs the entire drive to manage backup versions. If you try to store other files on it, Time Machine will delete them to make room. Use one drive for Time Machine and a separate drive for file storage.

How often does Time Machine back up my Mac?

Time Machine backs up every hour if the drive is plugged in. If you unplug the drive, backups stop until you plug it back in. The first backup takes hours; later backups take minutes because Time Machine only saves changes.

What happens if I unplug my Time Machine drive for a month?

Time Machine pauses. When you plug it back in, it resumes backing up from that point forward. You will have no backups from the month the drive was unplugged, so if something goes wrong during that time, you cannot recover it from Time Machine.

Can I restore a single file from iCloud Drive if I delete it by accident?

Yes. Go to iCloud.com, click the file, and look for a version history or trash option. You have 30 days to recover deleted files. After 30 days, they are gone permanently.

Do I need both Time Machine and iCloud Drive?

No, but it is safer to have both. Time Machine is faster for restoring your entire Mac. iCloud Drive protects you if your external drive fails and lets you recover files from any device. If you only use one, Time Machine is the priority.