Secondary Storage Comparisons

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)