Objectives :-
>Differentiate between storage devices and storage media.
>Describe the characteristics of an internal hard disk including capacity, platters, read/write heads, cylinders, sectors and tracks, revolutions per minute, transfer rate, and access time.
>Discuss the purpose of network attached storage devices, external and removable hard disks, and hard disk controllers.
>Describe the various types of flash memory storage.
>Describe cloud storage and explain its advantages.
>Describe the characteristics of optical discs.
>Differentiate among various types of optical discs: CDs, archive discs and Picture CDs, DVDs, and Blu-ray Discs.
>Identify the uses of tape, magnetic stripe cards, smart cards, microfilm and microfiche, and enterprise storage.
Storage :-
>Storage holds data, instructions, and information for future use.
>A storage medium is the physical material on which a computer keeps data, instructions, and information.
>Capacity is the number of bytes a storage medium can hold.
>A storage device is the computer hardware that records and/or retrieves items to and from storage media.
Hard Disk :-
>A hard disk contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information.
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Flash Memory Storage :-
>Flash memory chips are a type of solid state media and contain no moving parts.
>Solid state drives (SSDs) have several advantages over magnetic hard disks.
*Faster access time.
*Faster transfer rates.
*Generate less heat and consume less power.
*Last longer.
>A memory card is a removable flash memory device that you insert and remove from a slot in a computer, mobile device, or card reader/writer.
>USB flash drives plug into a USB port on a computer or mobile device.
Cloud Storage:-
>Cloud storage is an Internet service that provides storage to computer users.
>Users subscribe to cloud storage for a variety of reasons:-
*Access files from any computer.
*Store large files instantaneously.
*Allow others to access their files.
*View time-critical data and images immediately.
*Store offsite backups.
*Provide data center functions.
Optical Discs:-
>An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser.
Other types of Storage Devices :-
>Tape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information.
>A tape drive reads and writes data and information on a tape.
>A magnetic stripe card contains a magnetic stripe that stores information.
>A smart card stores data on a thin microprocessor embedded in the card.
>Microfilm and microfiche store microscopic images of documents on a roll or sheet film.
Summary:-
>Various storage media and storage devices.
>Internal hard disks, external and removable hard disks, solid state drives, memory cards, USB flash drives, ExpressCard modules, cloud storage, CDs, DVDs, and Blu-ray Discs, tape, smart cards, and microfilm and microfiche.
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