Compares the different secondary storage options
Hard disk capacity
500GB-12TB
CD ROM/RW capacity
640MB (7th)
DVD ROM capacity
4.7GB
DVD RW capacity
4.7GB (5th)
Blu-ray ROM/RW capacity
50GB (4th)
SSD capacity
256GB-4TB (2nd)
USB memory stick capacity
2GB-2TB (3rd)
Hard disk access speed
Slow (3rd)
CD ROM/RW access speed
Very slow (7th)
DVD ROM access speed
Slow (3rd)
DVD RW access speed
Slow (3rd)
Blu-ray ROM/RW access speed
Slow (3rd)
SSD access speed
Very fast (1st)
USB memory stick access speed
Fast (2nd)
Hard disk portability
Internal are fixed, external are portable (6th)
CD ROM/RW portability
Very portable (1st)
DVD ROM portability
Very portable (1st)
DVD RW portability
Very portable (1st)
Blu-ray ROM/RW portability
Very portable (1st)
SSD portability
Internal fixed, external portable (6th)
USB memory stick portability
Very portable (1st)
Hard disk durability
Reasonable but damaged if dropped (3rd)
CD ROM/RW durability
Easily scratched and broken (4th)
DVD ROM durability
Easily scratched and broken (4th)
DVD RW durability
Easily scratched and broken (4th)
Blu-ray ROM/RW durability
Easily scratched and broken (4th)
SSD durability
Robust and resilient (1st)
USB memory stick durability
Robust and resilient (1st)
Hard disk reliability
Very reliable if looked after (1st)
CD ROM/RW reliability
Very reliable if looked after (1st)
DVD ROM reliability
Very reliable if looked after (1st)
DVD RW reliability
Very reliable if looked after (1st)
Blu-ray ROM/RW reliability
Very reliable if looked after (1st)
SSD reliability
Reliable (6th)
USB memory stick reliability
Reliable (6th)
Hard disk cost
Cheap (3rd)
CD ROM/RW cost
Very cheap (1st)
DVD ROM cost
Cheap (3rd)
DVD RW cost
Expensive (5th)
Blu-ray ROM/RW cost
Very cheap (1st)
SSD cost
Very expensive (7th)
USB memory stick cost
Expensive (5th)