Backing up your Mac is simple and important. We recommend it for everyone.
To see the size of a specific file or folder, click it once and then press Command-I. To see storage information about your Mac, click the Apple menu in the top-left of your screen. Choose About This Mac and click the Storage tab. For Time Machine backups, it's good to use a drive that has at least twice the storage capacity of your Mac. Transferring Data From a Mac to PC via an External Hard Drive. Mac OS X and Windows can both read and write to disks in the FAT or ExFat format. Because Mac OS X Mountain Lion does not natively support writing to an external NTFS drive, you must erase your hard disk and format it.
Back up with Time Machine
Time Machine is the built-in backup feature of your Mac. It’s a complete backup solution, but you can use other backup methods as well.
Create a backupStore files in iCloud
You can also use iCloud and iCloud Drive to store files, such as your photos, documents, and music.
Set up iCloud and iCloud DriveRestore your Mac from a backup
When you have a backup, you can use it to restore your files at any time, including after the original files are deleted from your Mac.
![Hard Drive For Mac Pro Laptop Hard Drive For Mac Pro Laptop](/uploads/1/2/7/5/127584609/616200072.jpg)
Replace Hard Drive Mac Pro
Restore from a backupHard Drive Mac Pro Laptop
Prepare your Mac for service
Making a backup is an important part of preparing your Mac for service, especially because some types of repair might require erasing or replacing your hard drive.
How much space do I need for a backup?
To see the size of a specific file or folder, click it once and then press Command-I. To see storage information about your Mac, click the Apple menu in the top-left of your screen. Choose About This Mac and click the Storage tab. For Time Machine backups, it's good to use a drive that has at least twice the storage capacity of your Mac.
Related topics
Free up storage on your Mac
macOS can save space by storing your content in the cloud. This isn't a backup, but it includes new tools to make it easier to find and remove large or unwanted files before you make a backup.
Use Optimized Storage in macOSErase or format a storage device
You can use Disk Utility if you need to erase or format a storage device.
External Hard Drive For Apple Mac Laptop
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macOS Community
Best External Hard Drive For Mac
If you can't back up your Mac
External Hard Drive For Mac Pro Laptop
We'll find the best support options for you.