Logical file representation:
The user's view of the way data is stored
Physical file representation:
The actual physical way the data is stored on the storage media as viewed by the computer
Magnetic disks :
Record data using magnetic spots on disks made of flexible plastic or rigid metal
Floppy disk:
Low capacity, Termovable magnetic disk
Hard drive:
Storage system consisting of one or more metal magnetic discs permanently sealed with an access mechanism inside its drive
Optica discs:
store data optically (using laser beams) instead of magnetically
Burning:
Recording data onto an optical disc
Flash memory card:
A small card containing flash memory chips and metal contacts connect the card the device or reader that it is being used with
Flash memory drives:
Consist of flash memory and a reader in a single self-contained unit drives that