1. STORAGE
1.1. HARD DISK
1.1.1. FUNCTION
1.1.1.1. storage device that contain one or more inflexible, circular platters that use magnetic particles to store data, instructions and information
1.1.2. CHARACTERISTICS
1.1.2.1. high-capacity storage
1.1.2.2. components enclosed in airtight, sealed case for protection
1.1.3. TYPES
1.1.3.1. INTERNAL HARD DISK
1.1.3.1.1. an internal hard disk can be mounted inside a dekstop or laptop
1.1.3.2. EXTERNAL HARD DISK
1.1.3.2.1. an external hard disk is a separate freestanding storage devices that connects with a cable to a USB port or other port on a computer or mobile device
1.2. SOLID STATE DRIVES
1.2.1. FUNCTION
1.2.1.1. a storage device that uses flash memory to store data, instructions and information
1.2.2. CHARACTERISTICS
1.2.2.1. SSDs contain no moving part
1.2.2.2. current SSDs storage capacities up to 8 TB
1.2.3. CAPACITIES
1.2.3.1. 16GB-256GB
1.3. FLASH MEMORY STORAGE
1.3.1. TYPES
1.3.1.1. USB flash drive
1.3.1.1.1. users plug in a USB port on computers or mobile devices
1.3.1.1.2. CAPACITIES : 512-128GB
1.3.1.2. memory cards
1.3.1.2.1. users insert and remove from a slot in personal computer, smartphone, digital camera or card reader/writer
1.3.1.2.2. TYPES
1.4. OPTICAL DISC
1.4.1. DESCRIPTION
1.4.1.1. a storage media that consists of flat, round, portable disc made of metal, plastic and lacquer that is written and read by a laser
1.4.2. FUNCTION
1.4.2.1. stores data in deformities on the surface of a circular disc and reads this data by illuminating the surface with a laser diode and observing the reflection
1.4.2.2. primarily used to store software, data, digital photos, movies and music
1.4.3. TYPES
1.4.3.1. compact disc (CD)
1.4.3.1.1. FUNCTION
1.4.3.1.2. TYPES
1.4.3.1.3. CAPACITIES
1.4.3.2. digital video disc (DVD)
1.4.3.2.1. FUNCTION
1.4.3.2.2. TYPES
1.4.3.2.3. CAPACITIES
1.4.3.3. blue-ray disc (BD)
1.4.3.3.1. FUNCTION
1.4.3.3.2. TYPES
1.4.3.3.3. CAPACITIES
2. DEFINITION
2.1. STORAGE
2.1.1. storage holds data , instructions and information for future use
2.2. STORAGE CAPACITY
2.2.1. capacity is the number of bytes (characters) a storage medium can hold
2.3. STORAGE DEVICE
2.3.1. hardware that records and/or retrieves items to and form storage media
2.4. STORAGE MEDIA
2.4.1. the physical material on which a computer keeps data, information, programs and application