Mapa mental
Secondary Storage
Mind map: Secondary storage
Conteúdo do mapa
Secondary Storage
Stores data and programs when the power is switched off
Magnetic Hard Disk
- Stores the operating system, installed programs and user data
- Reliable
- High capacity
- Low Cost
Optical Disk
- Transfers files or distributing software
- Good capacity
- Low cost
- Lightweight and portable
- A CD can store 700 MB and DVD can store 4.7 GB
Flash Memory
- Consumes little power
- Good capacity (but less than a hard disk)
- Used in hand held devices
- More expensive than a hard disk
Main considerations when selecting storage
- Capacity
- Speed of data transfer
- Portability
- Durability (how easily it's damaged)
- Reliability