To create a S3 bucket in AWS, here are the steps in brief:-
1. Navigate to S3 section in AWS Console.
2. Select on Create Bucket.
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3. Fill in the credentials as per your requirement.
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4. Click on Next. Skip all the other steps. It is not required now. Click on Create Bucket.
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5. You can either search by name or scroll down to find your created bucket.
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You have created a bucket. Hope this helps.