For some computer owners, finding enough storage space to hold all the data they’ve acquired is a real challenge. Some people invest in larger hard drives. Others prefer external storage devices like thumb drives or compact discs. Desperate computer owners might delete entire folders worth of old files in order to make space for new information. But some are choosing to rely on a growing trend: CLOUD STORAGE.

While cloud storage sounds like it has something to do with weather fronts and storm systems, it really refers to saving data to an off-site storage system maintained by a third party. Instead of storing information to your computer’s hard drive or other local storage device, you save it to a remote database. The Internet provides the connection between your computer and the database.

Here the  data center operators, in the background, virtualizes the resources according to the requirements of the customer and expose them as storage pools, which the customers can themselves use to store files or data objects. Means by using internet interfacing techniques we will be able to store the data we need in virtual storage devices of any server’s data base.


Actually cloud storage is a sub-category of cloud computing which offer users access to not only storage, but also processing power and computer applications installed on a remote network.
There are hundreds of different cloud storage systems. Some have a very specific focus, such as storing Web e-mail messages or digital pictures. Others are available to store all forms of digital data. Some cloud storage systems are small operations, while others are so large that the physical equipment can fill up an entire warehouse. The facilities that house cloud storage systems are called data centers.
At its most basic level, a cloud storage system needs just one data server connected to the Internet. A client (e.g., a computer user subscribing to a cloud storage service) sends copies of files over the Internet to the data server, which then records the information. When the client wishes to retrieve the information, he or she accesses the data server through a Web-based interface. The server then either sends the files back to the client or allows the client to access and manipulate the files on the server itself.
Cloud storage systems generally rely on hundreds of data servers. Because computers occasionally require maintenance or repair, it’s important to store the same information on multiple machines. This is called redundancy. Without redundancy, a cloud storage system couldn’t ensure clients that they could access their information at any given time. Most systems store the same data on servers that use different power supplies. That way, clients can access their data even if one power supply fails.


  The two main factors effecting cloud storage are Reliability and Security. Clients surely doubt about the privacy of their data stored over internet and also about the security whether his/her data is not lost.
To secure data, most systems use a combination of techniques, including:
Encryption: this means usage of complex algorithms to encode the information. To decode those encrypted files client need to have a unique encryption key. This leads to immobilization of hackers to access your data without the password.

Authentication: it is a process, which requires creating a user name and password.

Authorization: means here the client lists the people who are authorized to access information stored on the cloud system.

These preventive measures prove their existence by securing the client’s information from hackers. And the cloud storage companies exist by their reputation in their field.
Some examples of cloud storage are
Web e-mail providers like Gmail, Hotmail and yahoo mail store e-mail messages on their own servers. Users can access their e-mail from computers and other devices connected to the Internet.

Sites like Flickr and Picasa host millions of digital photographs. Their users create online photo albums by uploading pictures directly to the services’ servers.

YouTube hosts millions of user-uploaded video files.

Now a days so many websites are offering this cloud storage facility and one of the best site is Click Here

And also there are few other sites like Ninefold and so on. Here we can store our information up to 10GB and this space can be extended for premium users.

Posted by

Gopi chand ( MGIT ECE 3rd year)

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