What Is a Storage Device?

When computer data is not being used by CPU (PROCESSOR), it must be stored on a storage device. It’s just a place to store all the data (binary data).

Types of Storage Devices:

A PC computer has different types of storage devices:

  • Floppy disk drive: FDD is a form of magnetic media, which were used to storage data and had a capacity of 1.44MB. But not they are replaced with USB, which we call them Pen drives or flash drives.
  • USB Memory Key: Today we can get around 16 GB to 32 GB USB Memory sticks. These high storage capacity drivers are used a lot to store any kind of data and carried in your pockets at any time. It is rarely affected by dust.
  • Hard Disk Drives: HDD is also called HD – HD is a form of magnetic media sealed and made up of platters that are stacked. Today we get 1 terabyte HD disks for affordable price. HD systems are made up of the controller, hard disk and host adaptor. Types of disk controllers and host adaptors are: SATA, EIDE, SCSI, etc.
  • CD/DVD Storage Devices: today every PC you purchase comes with DVD drive. These can read and write both CD’S and DVD’S. Both CD/DVD are optical disks.

Types of DVD Formats:

Different types of DVD formats include:

  • CD ROM – read only memory, stores about 650MB of data
  • CD-R – recordable, drivers are sometimes called “CD Burners”
  • CD-RW – rewritable
  • DVD – stores 4.3 GB of data, single sided
  • DVD-DL – double layer, stores 8.6GB of data
  • DVD+R, DVD+RW, DVD-R, DVD-RW – recordable and rewritable DVD formats
  • Blu-ray Disc – stores about 25GB (single layer) and 50 GB (double layer)
  • HD DVD – 15GB (single layer) and 30 GB (double layer)