Make sure that you have already connected the required storage device you want to use to save the backups to.

Tap on the Time Machine icon in order to begin with the process.

Click on the System Preferences option from the Apple menu located at the top left part of your home screen.

A 1TB USB drive or SSD drive is recommended but you will be able to manage with a smaller one as well. Note: You will need to use quite a large external hard drive for your Mac if you want these backups to be as detailed and as often as the ones we have mentioned above.

These snapshots will exist if you have provided a storage device Time Machine will use to back up to, but the snapshots are located on your Mac.

There are also snapshots which can be used as soon as you start your computer and they are also created quite often. It makes hourly backups for the past day, daily backups for everything you have been doing in the last month, and weekly backups as well. Time Machine keeps a backup of everything you create on your Mac.

Backup my mac air