File handling in AWS is essentially a cloud storage solution that enables corporations to store, manage, and access their data in the cloud. AWS provides a wide range of cloud storage solutions to handle files effectively. 

Among these, Amazon S3 is the most popular and widely used service for object storage in the cloud. It offers highly scalable, durable, and secure storage for any kind of data, such as images, videos, documents, and backups, at a low cost.