Let's assume that you have signed up for Amazon S3 service and downloaded and installed S3 Browser. When you run it for the first time you will see the following window that allows you to add a new Amazon S3 Account.

Special note for IAM users: you don't need to create an AWS Account and sign up for Amazon S3 Service, just use your Access Key ID and Secret Access Key.

Here are descriptions of the fields you need to fill:

Account Name	You can assign any name to your Amazon S3 account. S3 Browser uses it to distinguish one account from another if you work with several accounts.
Account Comment	Any comment associated with this account. This field is optional.
Access Key ID	Your Access Key ID. You can obtain it here.
Secret Access Key	Your Secret Access Key. You can obtain it here.
Encrypt my credentials	Turn on this option if you want to protect your Access Key ID and Secret Access Key with a master password.
Password	Master password that you want to use to encrypt/decrypt Access Key ID and Secret Access Key.

All fields with the exception of Account Comment are mandatory.

When you have entered all necessary information click the OK button. Now you are ready to start working with S3 Browser.

All files on S3 are stored in top-level containers called a 'buckets'. You need to create at least one bucket before uploading files to Amazon S3. Click here to learn how to create an Amazon S3 Bucket. Use this link to learn more about Amazon S3 Buckets.

Once you have created a new bucket, you can create virtual folders to organize your files, and upload and download files to and from Amazon S3.