Part B Computer Storage

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Presentation transcript:

Part B Computer Storage Computer Applications

Storage The place in the computer where data is held while it is not needed for processing A storage device is device used to record (store) data The most popular storage devices today are USB drives, internal and external hard disks, CDs and DVDs, and cloud storage

Three Kinds of Storage Magnetic Storage Optical Storage Electronic Storage (sometimes called Flash Storage)

Magnetic Storage A means of recording or saving data onto disks or tape by magnetizing particles Information is recorded and retrieved by means of magnetic read/write heads Magnetic storage devices include: hard drive, floppy disk, digital tape

Hard Drive A mass storage device located inside the computer’s system unit (tower) Used to store application software and user data Typical hard drive storage capacity can range from a few hundred Gigabytes up to a few Terabytes

External Hard Drives A hard drive that has its own separate case and sit outside of your computer’s system unit Connects to your computer via USB cable Portable

Floppy Disk The floppy disk, once an icon of the computer age, is becoming obsolete Stores 1.4 MB People used floppy disks to store data and transfer it from one location to another There is not enough room on a floppy disk to store one song or one photo from a high-resolution camera

Magnetic Tape Used by some businesses to backup and archive large amounts of data. As of 2011, tape cartridges could store up to 5 TB of data.

Optical Storage Optical storage is the use of low powered lasers to save (burn) and read data from CDs and DVDs.

Optical Storage Devices Description Storage Capacity CD Used to store music, software, and documents 650 Megabytes up to 1 Gigabyte DVD Used to store videos and photos; allows for better graphics and greater resolution photos Single Sided: 4.7 Gigabytes Multi-layer DVDs like Blue-ray: Up to 500 Gigabytes CD-ROM, DVD-ROM Read Only; can never save to this CD or DVD CD-R, DVD-R Burn to once; thereafter read-only CD-RW, DVD-RW Burn to many times until the CD is full; you can reformat, erase and rewrite to them