Data storage is the recording or storage of electronic data.Nowadays, there are many important information and documents that need to be stored in order to run a business.Both large and small industries have a large number of documents.Not just organizations, even at home, need to store all the necessary information, whether it's about the details of the bill, or just the storage of music, movies, and other entertainment-related necessities.Before using computers and the Internet, companies provide a lot of storage space in the form of files, files and files.The information they contain is detailed information about employees, customers and other important information that helps the company to operate.With the advancement of science and technology, simple computers have brought revolutionary changes.In addition to storing information, it saves manpower and makes the whole system cost-effective.So, where are all the digital data stored in the world?They are stored in multiple locations around the world.They are stored in many data centers.Online storage of some data;On some devices.devices.They include hard drives, optical drives, digital tapes, etc.A study shows that 52% of the world's digital data is stored on hard drives.Currently, these devices use optical or magnetic technology.The discs are cd and dvd.These devices can be as portable as CDs, disk drives, memory cards, flash memory devices, etc., or semi-portable as hard drive or RAM.There are also fixed devices, such as circuits with volatile RAM.Each optical device is a circular plate made of plastic.They produce laser beams that study micro-hole patterns.In addition to these devices, there are several online methods.Space is provided for these services;Therefore, a large number of files required by your business can be saved and protected.And other link tools that must be updated.The barrier to online data is security, which poses a threat in the form of viruses and other complications.With the growth of population and the development of the industry, the existing data storage methods may not be able to support the growing data.Ongoing research is being conducted around the world to update the available devices.The latest outcome of this development is a dynamic optical storage medium called holographic memory.The system uses photosensitive crystal to collect data.Another method is the storage of 3D holographic information.This feature provides better speed and capacity.In the next few years, we can find new storage devices to replace existing storage devices.This choice is always excessive in terms of saving data