AWS S3 Versioning, MFA Delete, and Websites

Versioning

Versioning allows us to keep multiple versions of the same file in an S3 bucket. When versioning is enabled and we add a new file to an existing key, instead of overwriting the file, S3 adds a new version to the file.

In the example below, when versioning is turned off, the new tree.jpg file replaces the existing tree.jpg file. When versioning is enabled, the new tree.jpg file is added as a new version in the S3 bucket. When we enable versioning in a bucket, the existing objects in the bucket will have a null version.