Files are stored one by one in a sequence

Stores files so that they can instantly be accessed

Must search through the files one by one until you get to the one you want.

Direct Access of data using search indexing

Magnetic Tape

Flash drive

Cassette Tape

CD ROM

Magnetic Tape

Flash drive

VHS Tape

External Hard drive

internal hard disk drive

Flash drive

DVD ROM

Portable hard disk drives

Blu-ray

Flash drive

DVD ROM

SSD

Secondary: Usually used to store data while it is being processed by the CPU.

Main Memory: Data's are hold permanently

Secondary: Temporary holding data

Main Memory: Usually used to store application software, operating system software, files etc.

Secondary: Data will be lost when computer is turned off

Main Memory: Volatile

Secondary: Non-Volatile

Secondary Memory: Included RAM and ROM

Very fast data transfer rate and fast access times to data

No Moving parts so last long

Faster than SSD

Large storage capacity

More expensive than SSD

Data transfer rate/data access time is slower than Optical Disks

Can be easily damaged without correct shut down procedure

Have many moving parts

More stronger and durable compared to internal HDD

easy to move and transfer data/files from one desktop system to another

is Cheaper than internal HDD

Where Operating system is stored and is essential part of desktop computers

Used by large organization for long term archiving data

This device connects to the computer using the USB Port.

Main backing storage device used by all computers to store

Used mostly for Audio data

Very slow data access times

Can be easily damaged if dropped

Have many moving parts like HDD

Affected by magnetic field

Has moving header to read the data

is read by bouncing the laser beam off the surface off the medium.

data is read directly from Microchip

Uses light and pin to read the data

Hold more data than floppy disks.

More durable and last longer than thumbdrive

Compatible with audio systems.

Compatible with audio systems.

Data transfer rate is slower compared to other storage medium

Not Robust - easily be damaged or scratched.

Have many moving parts like HDD

Not portable

Hold more data than CD-ROM's

CD ROM is used for video recording only

Can record Videos in DVD with higher resolutions.

CD holds 4.7 GB of data

Requires special software to run

Have to buy a separate DVD player

it is used only to record videos

is more expensive the thumbdrives

CD-R/DVD-R are only record-able once and are used for Read Data only

CD-R/DVD-R holds more better quality videos and imaged

CD-RW and DVD-RW allows for data to be written, erased and rewritten many times

CD-RW and DVD-RW are cheaper than CD-R/DVD-R

Use number of concentric tracks

Once data is been recorded and the process has been finalised then the disks become Read Only.

Storage size is smaller then CD-ROM

Allows simultaneous read /write and great longevity

Requires special and expensive software to run

Not as compatible as R or RW format

it is used only to record videos

is affected by the cool weather