STORAGE
- physical material on which a computer keeps data, information, programs, and applications
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v Cloud storage - an Internet service that provides storage to computer or mobile device users.
 v Capacity is the number of bytes a storage medium can hold.
v Items on a storage medium remain intact even when you turn off a computer or mobile device.
v Access time measures :
-The amount of time it takes a storage device to locate an item on a storage medium.
-The time required to deliver an item from memory to the processor.
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HARD DISKS
- contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information
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ü Characteristics of a hard disk include :
ü An external hard disk is a separate freestanding storage device that connects with a cable to a USB port or other port on a computer or mobile device.
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FLASH MEMORY STORAGE
- a type of solid state media and contain no moving parts
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v A memory card is a removable flash memory device that you insert and remove from a slot in computer or mobile device.
 
v USB flash drives plug into a USB port on a computer or mobile device.
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OPTICAL DISCS
- consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser
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v Optical discs commonly store items in a single track that spirals from the center of the disc to the edge of the disc.
v Track is divided into evenly sized sectors.
v CD-ROM - can read from but not writable or erasable.
v CD-R - users can write once, but not erase.
v CD-RW - erasable multisession disc
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OTHER TYPES OF STORAGE
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v A magnetic stripe card contains a magnetic stripe that stores information.
v A smart card stores data on an integrated circuit embedded in the card.
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Radio Frequency Identification (RFID)
- RFID tag consists of an antenna and a memory chip that contains the information to be transmitted via radio waves.
v Microfilm and microfiche store microscopic images of documents on a roll or sheet film.
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SUMMARY
• Variety of storage options
• Storage capacity and storage access times
• Advantages and various uses of cloud storage
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