What are secondary storage devices?

Standard in the 21st century is for computers to be equipped with a certain amount of storage on their hard drives. Typical sizes are 160 GB (gigabytes), 250 GB or 500 GB. According to the standards of the original disk units in 1956, which could accommodate 5 megabytes (MB), they are gigantic. However, applications and some file types, such as multimedia files, mean that even these large hard drives can fill up quickly. In addition, backup is often needed for safety. For these reasons, external storage solutions are often used, sometimes referred to as secondary storage devices.

Over the years, a number of secondary storage devices have been created and used. Some are currently much less popular, including vacuum tubes, punch cards and punch tapes, magnetic drums. The leadership and in the 20th century came and left in the 20th century, called discs, also called floppy disks, both 5 1/4 inches) and 3 and 1/2 inches). Zippered discs that are similar to the sizeThe smaller floppies survive and hold between 100 and 750 MB of data, as well as the Rev disk that holds up to 90 GB of data. The magnetic tape will last as a secondary storage device that has been used for more than 50 years.

different types of CDs and DVDs are commonly used by secondary storage devices. Both are types of optical disks, written and reading using light. They are three types. Reading examples include CD, CD-ROM, DVD-ROM and DVD-Videos. Write a lot of (worms) examples include CR-RS, DVD-RS, DVD+RS and Worms. Finally, optical secondary storage devices include CD-RWS, DVD-RAM, DVD-RWS, DVD+RWS and MOS.

Another secondary storage includes external hard drives. It can be mobile or table models. Some are made not only for storage, but also for streaming music, movies or photos, for multimedia devices such as the Xbox 360® or PlayStation® 3.

USB FLASH DIVES ARRIVALIt holds in many models A from 512 MB to 256 GB, Kingston® DataTraveler® 300 storage capacity, which manufacturer claims to be the largest USB flash drive in the world. These secondary storage devices are also known as flash drives, pen units, inch units and other names. Many USB flash drives are to be attached to a key ring or worn around the neck on the cord.