Explain cloud storage
Describe remote data storage and identify the physical servers behind a cloud service.
Section 3 · Hardware
This sequence follows Cambridge IGCSE Computer Science 0478, 2026–2028 syllabus Version 6. It covers subject content sections 3.1–3.3 only. The separately published 2029–2031 syllabus is not mapped here. Practice is original, self-checked and does not award an official Cambridge grade. Full timed papers and human subject-teacher review remain outstanding.
Before you begin
- No programming language is required. Be comfortable with place value and multiplication; each lesson introduces the computer-science notation it uses.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What makes cloud storage remote?
What you will learn
- Define cloud storage
- Explain remote access
- Recognise that cloud data still resides on physical storage
Cloud storage is remote storage reached through a network
Cloud storage stores files on remote servers and lets users access them over a network, often from different devices. 'Cloud' describes remote service access; it does not mean the data has no physical location.
Apply and check the rule
Providers use physical servers and storage systems in data centres. Users depend on connectivity and the service's availability, access controls and security arrangements.
Pause and explain
What does a learner usually need to access a cloud file from another location?
Worked example
A student opens a saved assignment from home after uploading it at school. Why is this cloud storage?
Show the worked solution
- The file is stored on a remote provider's server.
- The student accesses it through a network from another location.
- The service's physical storage still exists in data centres.
Answer The file is stored remotely and accessed over a network; the cloud service uses physical servers.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Define cloud storage.
Give me a hint
Mention remote servers and network access.
Compare my reasoning
- The data is stored on remote physical servers.
- A user accesses it over a network.
Cloud storage stores data on remote servers and makes it accessible over a network.
Look for these in your work
- Remote location
- Server hardware
- Network access
A student has no internet connection on a new device. Why might a cloud-only document be unavailable?
Give me a hint
Consider how the device reaches remote storage.
Compare my reasoning
- The file is held remotely.
- The device cannot reach the service without a network connection, unless an offline copy exists.
The device cannot access the remote file without connectivity unless a local offline copy was saved.
Look for these in your work
- Remote storage recognized
- Connectivity dependency stated
- Offline exception
A learner says, 'I saved my project in the cloud, so there is no physical storage device.' Correct the explanation.
Give me a hint
Explain the service name and the underlying equipment.
Compare my reasoning
- The file is stored remotely rather than only on the learner's device.
- A provider stores it on physical servers and storage hardware.
- The learner accesses that hardware indirectly over a network.
Cloud storage is remote service access, not storage without hardware. Physical servers and storage hold the data, which the learner reaches over a network.
Look for these in your work
- Remote compared with local
- Physical infrastructure stated
- Access path stated
Common mistakes
- Claiming cloud storage has no physical storage device
- Confusing cloud storage with a local folder synced only on one device
What can you explain now?
Where does cloud-stored data physically reside?
Compare with the explanation
On physical servers and storage
Cloud storage is remote access to real server hardware.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
What physical equipment supports a cloud-storage service?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.