: A popular free option for those who want the simplicity of a .zip format but with automatic scheduling to prevent the "previous" version from becoming outdated. Potential Risks

: No special software is needed to open them; they are highly portable across different operating systems.

“Being restricted to one backup and incrementals is not really a good idea. You should have older backups as well as the current one.” AskWoody

Do you prefer (external drives) or cloud services ?

Manual backups are often discussed as a "last resort" or a simple way to freeze a project in time.