The main idea behind low-cost cloud storage is that CSPs provide same storage to different organizations and end users when and where they will need it. Cloud Storage main feature elasticity enables the user to use as much storage as he needs and release it after the use. The main advantage of this concept is that the initial cost of end user or enterprises is reduced means they don’t have to purchase the H/W, there is no maintenance cost as all of these resources will be provided by CSPs at very low cost. It means end user or enterprise have to pay money to the CSP as per the usage of their resources such as storage. Cloud Storage is provided by third party service providers known as Cloud Service Providers (CSPs) on a pay as per usage model. To overcome this, the concept of Cloud Storage came into existence and it ranges from an end user to an enterprise. As the data growth in all enterprises is increasing almost 50% every year, so around 30% capital expenditure of each enterprise is used for storage. Storage is considered as one of biggest expenses of Information Technology.
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