Devices that are capable of storing, reading and writing data or information on storage media called as storage devices.
- There are many ways of storing information and data for the modern computers.
- Personal computers allows lot of information to store which are smaller and easy to handle like pen drive, portable hard disk, memory card etc.
- Purpose of storage devices to hold data even when computer is turned off.
- Storage capacities are increased from MB to GB, GB to TB and now TB to PB (Peta Byte).
Types of storage
- In volatile data or information is lost when power supply is cut off.
- Storage devices are faster than non-volatile storage devices.
- E.g.: RAM, cache memory etc.
- In nonvolatile data or information is not lost even when power supply is cut off.
- Non-volatile storage devices are slower than volatile storage devices.
- E.g.: hard disk, optical disc, memory card, magnetic tape etc.
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