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Simple Ways to Clean Up PC Storage Effectively (2026)

TG By The TechFix Guide Editorial Team  ·  Updated  ·  How we check our guides
A cluttered desk with a laptop connected to an external drive, being tidied and organized

The "your disk is almost full" warning always arrives at the worst moment — while saving a file, recording a video, or installing an update that refuses to continue. Cleaning up storage does not have to mean hunting through folders and deleting things you might need. A handful of safe, built-in tools will show you exactly what is taking the space, and a few predictable folders hold most of the junk. Here is an effective routine, ordered from biggest wins to finest detail.

Step 1: See What Is Actually Using the Space

Do not guess — measure.

  1. Windows: Settings → System → Storage. You get a breakdown by category: apps, temporary files, documents, photos. Click a category to drill in.
  2. Mac: System Settings → General → Storage shows the same kind of breakdown with cleanup recommendations.

Spend two minutes here. Most people discover one or two categories — videos, installers, a bloated app — hold most of the space, which tells you exactly where to work.

Step 2: Empty the Trash and the "Recently Deleted" Pile

Deleted files are not really gone until these are emptied, and they still occupy full space:

  • Empty the Recycle Bin (Windows) or Trash (Mac) after a cleanup.
  • Photos apps keep deleted pictures for around 30 days — empty "Recently Deleted" in the Photos app too.
  • Email and cloud apps have their own trash folders; if you archive a lot of mail, it is worth a look.

Step 3: Clear Out the Downloads Folder

Downloads is where old installers go to die. Every program you installed left its setup file behind — they served their purpose the moment installation finished.

  1. Open Downloads and sort by size, then by date.
  2. Delete .exe / .msi / .dmg / .zip files you no longer recognize as needed — if the program is installed, the installer is redundant.
  3. Keep anything you can't identify in a subfolder rather than deleting it, and move documents you actually want into Documents.

It is common to reclaim several gigabytes from this one folder.

Step 4: Use the Built-In Cleanup Tools

The operating system knows which files are safe to remove:

  • Windows: Settings → System → Storage → Temporary files. Tick previous Windows installations (if present — often many GB), old update leftovers, and thumbnail caches. Also consider turning on Storage Sense on the same page so this happens automatically.
  • Mac: in Storage settings, review the recommendations — "Empty Trash automatically" and "Review large files" are the useful ones.

Stick to these built-in lists. They only propose files the system knows are disposable, which makes them far safer than third-party "cleaners".

Step 5: Uninstall Apps You No Longer Use

  1. Windows: Settings → Apps → Installed apps, sort by size. The 20 GB game you finished two years ago is usually the single biggest win available.
  2. Mac: open Applications, sort by size, and drag unused apps to the Trash.
  3. Judge by the last-used date, not by how useful the app sounds. Anything untouched for a year reinstalls in five minutes if you ever need it again.

Step 6: Move Big Personal Files Off the System Disk

Photos, videos and project archives are the files that quietly grow forever, and they are exactly the files an external drive or cloud storage handles well:

  1. Plug in an external drive (or set up your cloud sync folder) and move finished video projects, camera dumps and old archives off the system disk.
  2. Keep originals of anything precious in two places — the goal is freeing the system disk, not deleting your memories.
  3. On Windows, you can change where new photos and downloads land (Settings → System → Storage → Advanced storage settings) so the drive fills slower in the future.

Step 7: Hunt the Big Files Directly

For a final pass, find the individual monsters:

  • Windows: open File Explorer → This PC, search the drive for size:gigantic (>4 GB) or size:huge (>128 MB), then sort by size.
  • Mac: Apple menu → About This Mac → Storage (or the Storage settings "large files" recommendation) to list the biggest files.

Typical finds: an ISO file downloaded once, a phone backup from years ago, a video exported five times. Delete the obsolete copies, keep the final ones.

What Not to Delete

Never delete files inside Windows, Program Files or the macOS System folder to save space — removing system components breaks the operating system and causes far worse problems than a full disk. Skip third-party "cleaner" utilities that promise to double your space: they delete caches that apps then rebuild anyway, and aggressive ones delete things you miss. And don't compress documents by deleting the originals — if a file matters, it moves to a second location, it doesn't vanish.

Quick Checklist

  • Storage breakdown reviewed; biggest category identified
  • Recycle Bin / Trash / Recently Deleted emptied
  • Downloads folder cleared of old installers
  • Built-in temporary-file cleanup run (or Storage Sense enabled)
  • Unused apps uninstalled, sorted by size
  • Large personal files moved to external drive or cloud
  • Biggest individual files hunted down with a size search

This routine usually reclaims double-digit gigabytes in under an hour, and turning on Storage Sense keeps the small stuff from ever accumulating again. If your drive is small and permanently cramped despite all this, a larger SSD or moving your photo/video library to an external drive is the durable fix — but most people never need it after Step 5.

FAQ

Is it safe to delete the "Windows.old" folder?

Yes — after roughly ten days Windows removes it automatically anyway. It holds the previous system version for rollback. Delete it from Settings → System → Storage → Temporary files (not by hand), and only when you're satisfied the current system works well.

Why did my free space not increase after deleting files?

Check three things: the Recycle Bin still holds the files, the Photos app still holds them in "Recently Deleted", or a cloud sync app is still keeping local copies. Empty those and the space appears.

Do I need a third-party disk cleaner app?

No. Everything genuinely safe to remove is covered by the built-in Storage tools, which won't touch anything the system needs. Cleaner utilities mostly remove caches that refill within days and add another background process to your PC.