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Secondary Storage - Coggle Diagram
Secondary Storage
Optical
Data is written and read using a laser beam
Pits and Lands
Cheap
Slow access
Examples:
CDs
DVDs
Relatively large capacity
Magnetic
Low cost per GB
Not very robust
Uses different magnetic patterns to store data.
Examples:
Tape cartridges
Hard Drives
Large capacity
Solid State
Fast access
Expensive per GB
Data is sorted in flash chips
Examples:
SSDs
USBs
Storage devices
Not always connected to the computer
Not directly accessible by the system's CPU
Used to back up data stored in primary storage
Useful when there is a need for larger storage capacity