What is Data Storage? - Definition & Technologies

Lesson Transcript
Instructor: Randall Panduren

Randy is an ITIL certified IT Manager and Technical Professional with more than 20 years' experience in Information Technology.

Data storage is the process of maintaining digital information to be retrieved upon request by users. Learn about the various data storage technologies from RAM to flash drives and magnetic tape to name a few examples. Updated: 12/28/2021

Data Storage Overview

Imagine for a moment that you lost your ability to remember anything - not what happened a minute ago, or yesterday, or five years ago. You wouldn't really be able to function, would you? Computers and other technologies work the same way. Without the ability to store and retrieve data, they aren't very useful. Whether writing an email, watching an online video, visiting a web site, or using technology in another way, there is a constant flow of digital information that needs to be stored in order for the technology to serve its purpose.

Data storage is a term for how information is kept in a digital format that may be retrieved at a later time. Computers, laptops, tablets, smartphones, and other devices all store data. The methods and technologies used vary greatly, but the basic concept is always the same: information is kept so that it can be accessed again later.

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  • 0:03 Data Storage Overview
  • 1:00 Data Storage Technologies
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Data Storage Technologies

There are many different technologies used to store data, with new methods being created all the time. Some store data temporarily, and some for long periods of time. Many stay inside a computer or device, while others are portable and can be used on different devices or kept in other locations. There are many common technologies used to store data.

Let's go over some of them now:

Random Access Memory (RAM)

Also known simply as memory or computer memory, RAM is what computers use to hold information temporarily so it can be easily accessed by the computer as you work. It's a lot like your own short-term memory - things move in and out quickly and aren't kept permanently.

Hard Disk Drive

Most computers and laptops use pieces of hardware to store data. They typically remain inside the device and store information, such as computer programs and files. In contrast to RAM, hard disk drives store data permanently so it can be retrieved at a later time, much like your own long-term memory.

Flash Drive

Also known as thumb drives or USB sticks, flash drives are small, portable storage devices that can be plugged into the USB port on a device. Once data is stored on the flash drive, it remains there and can be removed and used in other devices. This is a common method for moving files between computers.

SD (Secure Digital) Card

SD (secure digital) cards are small cards commonly used in digital cameras and smartphones to store files, such as digital photographs. Like flash drives, they can be easily removed and accessed on other devices.

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