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Everyday security · Unit 01 · Lesson 5 of 6
Keep what matters
Your photos and files deserve both a private home and a way back.
After this lesson you can
- distinguish syncing files from a recoverable backup
- choose limited sharing for personal information
- describe how to check a backup without deleting an original
You accidentally delete a holiday photo. A minute later it disappears from your laptop too. But the photo was “in the cloud”. What went wrong?
Sync keeps locations aligned. Sometimes that means copying a deletion everywhere. A backup gives you a way to recover an earlier, usable copy.
A second location is a start
Cloud services may offer a recycle bin, version history, or backup features. Check what yours actually retains and for how long. “Synced” alone does not promise that every accidental change can be undone.
Keep important files in a backup that can survive the problem affecting the original. That might be a service with protected earlier versions or an external drive you disconnect when finished. For irreplaceable files, consider an additional copy in a different location.
Protect the account or device holding the backup too. Recovery is not helpful if someone else can read your private files or remove all the copies.
Try the way back
Check that recent files are included. Restore a sample to a separate location and open it. Keep the original: a recovery test should not create a loss.
Share only what the task needs
Before sharing a file, check the audience and permissions. “Anyone with the link” is different from inviting one person. View access is different from edit access. Remove personal details that the recipient does not need, and review access when the task is finished.
Takeaway: Protecting data means controlling who can use it and making sure you can get it back.
Terms you met
Check yourself
No timer. No penalties. Read the explanation and try again whenever you like.
This lesson’s questions have changed. Your reading progress is saved; review the updated questions.
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You delete a synced photo and it disappears from your other device. What happened?
Show the answer
Correct answer: Sync repeated the deletion across devices. Sync keeps changes aligned. Recovery depends on features such as retained versions or a separate backup.
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Which check gives useful evidence that a backup works?
Show the answer
Correct answer: Restoring a sample to a different folder and opening it. That tests a real recovery while preserving the original. Also check the backup covers recent files.
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You want one friend to see a private document. Which sharing setting fits?
Show the answer
Correct answer: Invite that friend with view access. Limit both the audience and what the recipient can do.
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Your backup is on an external drive. What helps protect it when not in use?
Show the answer
Correct answer: Disconnect it and store it safely. Separation can help keep malware on the device from affecting the backup too.
Try it
- WriteChoose three fictional files: a family photo, a project, and a public flyer. For each, write who should see it and where a recoverable copy would live. Plan a restore to a separate folder; do not delete any original.