In order to setup this addon you will need to have an AWS account. If you do not have an AWS account do not purchase this addon.
Your server must have the mbstring extension installed (check your environment page.)
I cannot and will not assist with the setup of of the S3 bucket or the generation of credentials. Amazon provides plenty of documentation on how to do this.
To setup the addon you will need 3 pieces of information.
If you do not have all three of these the addon will not function.
There are two optional settings:
In order for images to be edited using concrete5's built in image editor, you must be running concrete18.104.22.168+, and you must set the appropriate CORS policy on the S3 bucket.
For the actual policies required for this addon to function (v3.0+):