Amazon S3 is a scalable, low-cost and infinite storage solution provided by AWS, capable of storing petabytes of data as well as static websites and more.

S3 supports versioning for managing different versions of your stored files (objects in AWS terms).

Versioning is a useful feature provided by Amazon S3 that lets you create multiple versions of a file, whenever a file that already exists, is re-uploaded. Instead of overwriting the file and erasing the old one, S3 will overwrite the file with the latest file but keep a copy of the old file as an older version available to you...

Read more here:

https://medium.com/technology-hits/how-to-use-versioning-on-aws-s3-buckets-to-enable-overwrite-protection-of-your-data-1d2a52eccbbb