These Are The, Best Ways To Backup Your Important Data!(Link)
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❑ Back up with an external drive : This backs up to an external storage device such as USB drive. It is useful if you have a tool that automatically backs up to a connected external drive.
❑ Back up with an online back up service : This backs up to an online back up server. It is usually charged service and uses a program running in the background.
❑ Back up with a cloud storage service : This backs up to an cloud storage. It is usually free but big files and other than allowed file formats are limited.
❑ Do onsite, offsite, online backup at least two of them.