You'll get the AWS S3 Integration settings in Settings > App Settings > Integration > AWS S3.

You need access key ID and secret access key to integrate. Please follow the steps below to get them:

1. Go to the AWS IAM console.
2. On the navigation menu, choose Users.
3. Choose your IAM user name (not the check box).
4. Open the Security credentials tab, and then choose Create access key.
5. To see the new access key, choose Show. You'll see Access key ID and Secret access key there.
6. Add this credentials to the integration settings and click on Save & authorize.
7. If everything is correct it'll show a success message and the status will be Authorized.

That's all! You've successfully integrate with AWS S3. Now all files will be uploaded into AWS S3.