You might have a ton of reason to do this so I'm not going to bore you with an introduction.

If you don't have too much objects

Then you might be able to do it from the AWS Console interface.

  1. Create the bucket (you must do this).
  2. Then go in the original bucket you want to clone.
  3. Select all objects
  4. Click on "Actions" then "Copy"
  5. Select the destination
  6. Click Copy

This might take a while depending on the number of elements

If you have a lot of objects

Then you will have to use the terminal.

  1. Create the bucket (you must do this). You can do that in the AWS Console UI.
  2. Open your terminal and run the following command.
aws s3 sync s3://source-bucket s3://target-bucket

Again, might take a while depending on the number of elements