Memory & StorageKey Facts
Quick Reference - Storage Units
Part of Storage Units — GCSE Computer Science
This key facts covers Quick Reference - Storage Units within Storage Units for GCSE Computer Science. Revise Storage Units in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 9 of 9 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 9
Practice
15 questions
Recall
18 flashcards
Quick Reference - Storage Units
The Ladder (Memorize This!):
1 bit = 0 or 1 1 byte = 8 bits 1 KB = 1,024 bytes 1 MB = 1,024 KB 1 GB = 1,024 MB 1 TB = 1,024 GB 1 PB = 1,024 TB
Real-World Sizes:
- 1 KB: Short email, small text file
- 1 MB: High-quality photo, 1 minute of music
- 1 GB: HD movie (compressed), ~300 photos
- 1 TB: 250 movies, 250,000 songs, your entire computer backup
Common File Sizes:
- Text document: 50-500 KB
- Photo (phone): 2-5 MB
- Photo (DSLR): 5-20 MB
- Song (MP3): 3-5 MB
- HD movie: 4-8 GB
- PC game: 20-100 GB