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Previously we did had even some objective helping material for you. 
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Chapter # 7

RAID, SATA, IDE, USB, Cloud Storage, 

•	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 (RPM), transfer rate, and access time, 

•	Describe the various types of flash memory storage: solid state drives, 
memory cards, USB flash drives.

•	Differentiate among various types of optical discs: CDs, DVDs, and Blu-ray Discs. Also telm about CD-R, CD-RW, …. So on.

•	Identify the uses of tape, magnetic stripe cards, smart cards and  microfilm.

•	Optical disk & its working.

•	What is storage & explain Hard disk, optical disc & its working.

•	Characteristics & advantages of cloud storage & Optical discs