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So, now let's talk about Amazon S3 versioning.

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So your files in Amazon S3 can be versioned,

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but it has to be enable first at the bucket level.

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So we'll do this in the hands on.

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So that means that if you re upload a file version

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with the same key,

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then it will overwrite it,

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but it won't overwrite it,

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actually it will create a new version of that file.

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So instead of overwriting the file that already exists,

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it will create a new file version

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and I'm simplifying it here,

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but it will be version one,

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then version two,

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then version three,

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et cetera, et cetera.

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So, it is best practice to version your buckets

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in Amazon S3 in order to be able to

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have all the file versions for a while,

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because you can get protected against unintended deletes

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because you're able to restore a previous version.

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And also, you can easily rollback

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to any previous versions you wanted.

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So, you need to know a few things though.

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Any file that is not versioned prior to enabling

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versioning will have the version null.

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And if you suspend versioning in your bucket,

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it does not delete the previous versions,

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it will just make sure that the future files

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do not have a version assigned to it.

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So lets go in the hands on and see how that works.