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Slow computer

Storage full: what's safe to delete

Drive full? What's safe to delete on Windows and Mac: temp files, update leftovers, old apps, and big media, plus what never to touch.

Difficulty
Easy
Time
15-30 min
Steps
7
Updated

Sounds like this?

  • 'Low disk space' warning
  • Can't install updates
  • Drive bar shows red in File Explorer

Step by step

  1. Windows: Settings › System › Storage. Open Temporary files and remove Temporary files, Delivery Optimization files, and Windows Update Cleanup if listed.
  2. Leave Downloads unticked until you've checked that folder yourself.
  3. Turn on Storage Sense to clean temp files automatically.
  4. Settings › Apps › Installed apps: sort by size and remove large apps and games you no longer use.
  5. Move big videos and photo folders to an external drive or cloud, after confirming the copy opens.
  6. Mac: Apple menu › System Settings › General › Storage. Review the recommendations and large files.
  7. Empty the Recycle Bin or Trash.

Related error codes & messages

Quick answers

When should I stop and get professional help with "Storage full: what's safe to delete"?

Stop and get help if: Space fills up again quickly with no new files (could be a runaway app or malware). The drive is small (64-128 GB) and always full. Ask about a larger SSD. Boise Computer Care can diagnose it for a $60 fee; call 208-996-3508.

How long does this fix take and how hard is it?

Plan on 15-30 min. Difficulty: Easy.

Is it safe to try this myself?

Mostly, if you follow these precautions: Never delete files in C:\Windows, Program Files, or System32 by hand. Empty the Recycle Bin only after checking nothing important is inside. Don't use 'registry cleaners'; they don't free meaningful space and can break things.

Which error messages or codes does this guide cover?

Low Disk Space, 0x80070070.

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