How to Clean Up Disk Space on Your Computer

Cleaning up disk space can make room for downloads, updates, and new files, and may help a computer with very little free storage work more smoothly. The safest approach is to review what is taking up space, remove items you recognize, and use the computer’s built-in cleanup tools. Menu names differ slightly by operating system version, so look for equivalent storage or cleanup options if a path does not match.

What You’ll Need

A few minutes to review files and storage settings.
An external drive or trusted cloud storage if you need to back up files before deleting them.
Access to the computer’s administrator account for some system cleanup options.

Step-by-Step

Check available storage. Open the operating system’s storage settings. On Windows, look under Settings and System for Storage; on a Mac, open System Settings and select General, then Storage. The exact labels may vary slightly by version. Note how much space is free and which categories—such as applications, documents, photos, or temporary files—use the most.
Back up anything important. Copy valuable documents, photos, and other personal files to a separate drive or a cloud account before removing them. Confirm that the backup completed and that you can open a few files from it. A file synced to a cloud service may also disappear from other devices if you delete it there, depending on the service’s settings.
Review large personal files. Use the storage screen or file manager to sort folders by size. Look in common locations such as Downloads, Videos, Desktop, and Documents for old installers, duplicate exports, or large files you no longer need. Open files before deleting them if their names are unclear. Move keepers to another storage location rather than deleting them.
Uninstall applications you do not use. Use the system’s Apps or Applications settings to remove programs, rather than dragging unfamiliar folders out of system locations. Check that you have the installer, account access, or license information needed before removing software you may need again. Do not uninstall items whose purpose you do not understand, especially drivers or system components.
Use the built-in cleanup tool. In Windows, Storage settings may offer Temporary files or cleanup recommendations; review the categories before choosing what to remove. On a Mac, the Storage screen provides recommendations and category details. Names and available choices vary by version. Read each description: caches and temporary files are often replaceable, while options such as Downloads may contain files you still want.
Empty the Recycle Bin or Trash. Deleted files may continue using storage until you empty the relevant bin. Before doing so, check its contents carefully; emptying it can make recovery difficult or impossible. Some cloud services also have a separate deleted-items area that must be cleared independently.
Review cloud files and offline copies. If you use a sync service, check whether files are stored only online or also downloaded to the computer. Use the service’s own controls to remove a local download or make a file available online-only, if supported. Avoid deleting a synced file from its folder unless you intend to remove it from the cloud and other synced devices.
Restart and check storage again. Restart the computer if cleanup tools request it, then reopen storage settings. Some space is counted only after temporary files are cleared or a restart completes. If free space has barely changed, use the category breakdown to identify another safe target instead of deleting random folders.

Common Mistakes

Deleting unfamiliar folders. Avoid manually removing files from Windows, Library, system, or application-support folders. These can be needed for the operating system or installed programs. Use built-in cleanup and uninstall tools.
Assuming deleted means erased. Items in the Recycle Bin or Trash may still occupy space. Conversely, emptying those folders may remove your easiest recovery option, so inspect them first.
Removing files from a synced folder by accident. Sync is not always a separate backup. Deleting a file in one place may delete it everywhere. Check the service’s behavior and preserve a separate backup for irreplaceable files.
Clearing everything marked temporary. Some cleanup categories include data you may want, such as downloaded files or previous installation files used for recovery. Read the description and leave uncertain categories alone.
Expecting a cleaner app to solve everything. Avoid unknown utilities that promise automatic cleanup or ask for broad permissions. Built-in tools are usually a safer first choice.

Tips

Sort by file size to find a few large items rather than spending time reviewing every small file.
Keep a separate backup of important files, and check that it is current before major cleanup.
Set a recurring reminder to review Downloads, old videos, and unused applications before the drive becomes nearly full.
Leave free space for normal system activity and updates. There is no single ideal amount for every computer; needs depend on the device, its storage capacity, and how you use it.
If your computer has multiple drives, confirm which drive is full. Cleaning a different drive will not solve the problem.

Troubleshooting

Storage settings show more use than your files seem to explain: Categories may include hidden files, application data, local backups, or snapshots. Give the system time to recalculate, restart, and check the category breakdown again. Do not delete hidden folders manually to force the number down.

A cleanup option is missing: The feature may have a different name or location in your operating system version, or your account may not have permission. Search the system settings for “storage” or “temporary files,” or consult the operating system’s support instructions.

Files return after deletion: A sync service, backup program, or application may be restoring them. Check its settings and deleted-items area before removing anything again. If a file is important, make a separate backup first.

The drive still has almost no free space: Check for large videos, virtual machines, game files, or application libraries, and use the relevant app’s own storage manager. If the drive is full and the computer cannot update or start reliably, move personal files to a separate drive, then contact the device maker or a qualified technician rather than deleting system files.

Frequently Asked Questions

What can I delete to free up disk space?

Start with files you recognize and no longer need, such as old downloads, duplicate exports, and unused applications. Review built-in cleanup categories carefully and back up anything valuable first.

Does emptying the Recycle Bin or Trash free space?

Usually, yes: deleted items often continue using storage until the bin is emptied. Check its contents first because emptying it can make recovery difficult.

Is it safe to delete temporary files?

Many temporary files can be removed using the operating system’s cleanup tool, but review the listed categories. Do not manually delete files from system folders, and skip anything whose purpose is unclear.

Will deleting files from a synced folder remove them everywhere?

It can. Many sync services mirror deletions across devices and the cloud, though behavior depends on settings. Check the service’s instructions and keep a separate backup of files you want to preserve.

Why is my disk still full after I deleted files?

The files may still be in the Recycle Bin or Trash, storage totals may need time to update, or another category may be taking up space. Recheck the storage breakdown after emptying only items you have verified.

How much free disk space should I keep?

There is no universal target: operating systems, updates, and applications have different storage needs. Check your device’s requirements and try not to let the drive remain nearly full.

Further reading: Microsoft Support and Apple Support. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.