A backup is a digital copy of your most important information
Copies of your files (e.g. photos, documents, videos, etc.) are saved to an external storage device or to an online server like the cloud.
Backing up and having backups mean you can restore your files if something goes wrong. It is a precautionary measure so that your data is accessible in case something happens to your computer. We recommend backing up your files regularly.

You can set up automatic backups in your system or application settings for peace of mind
For Apple iPhone users
Read Apple's guide on performing regular backups to the cloud for iPhone.
For Apple Mac users
If you have an Apple Mac computer or laptop, read Apple's guides on backing up to an external storage device or the cloud.
For Microsoft Windows 10 users
If you have a Windows 10 PC, follow Microsoft's guides on backing up your folders with OneDrive and backup and restore Windows.