The cloud storage revolution is facing new hurdles in today's data - driven world. Our daily lives generate massive amounts of information – text, audio, videos – that fill up storage devices. To ensure data accessibility, cloud storage has become a popular choice. While service-oriented cloud storage offers cost-effective storage, a new challenge arises with the digital world. The proliferation of similar documents, like those in sharing and availability culture, leads to data duplication. This duplication inflates storage needs and backup costs. This paper proposes a system to optimize storage by identifying and filtering similar documents before uploading them to the cloud with the SHA algorithm.