Google's Backup and Sync tool has been available for a while now and can make backing up a file, folder or even a system very easy.
It comes in the form of a easy to download app that works on Windows and Apples alike.
This can be downloaded from the Google website.
Link to download https://www.google.com/drive/download/backup-and-sync/
Here's how to set it up:
1) Download the Backup and Sync tool.