What temporary files are and why you should delete them
Temporary files are copies of documents, images, and program data that your computer creates while you work but does not need to keep. When you edit a photo, browse the web, or install software, your system stores pieces of these tasks in a temporary folder so it can work faster. Once you close the program or finish the task, these files sit on your hard drive taking up space — sometimes gigabytes of it — even though you will never use them again.
Deleting temporary files frees up storage space, can speed up a slow computer, and removes clutter that makes finding your real files harder. Most people can safely delete all their temporary files without losing anything important, because the programs that created them do not rely on them after you close the program.
The process differs slightly depending on whether you use Windows or Mac, but both take less than five minutes once you know where to look.
Key Takeaways
- Temporary files are copies created by programs while you work and can be safely deleted once the program closes.
- On Windows, you can delete temp files through Settings or by opening the Temp folder directly and emptying it.
- On Mac, temporary files live in the Library folder, which is hidden by default but can be revealed through Finder.
- Deleting temp files typically frees up several hundred megabytes to several gigabytes of space depending on how long since you last cleaned.
- You should close all open programs before deleting temp files, because some programs lock their temporary files while running.
How to delete temporary files on Windows
The easiest method on Windows is to use the built-in Disk Cleanup tool. Open the Start menu, type "Disk Cleanup" into the search box, and click the Disk Cleanup process when it appears. A window will open asking you to select a drive — choose the drive where Windows is installed, usually labeled C:. The tool will scan for temporary files and show you how much space they occupy.
Once the scan finishes, you will see a list of file types you can delete. Check the box next to "Temporary files" — you can also check "Temporary internet files" if you want to clear your browser cache, though this will log you out of websites. Click "Delete Files" at the bottom, and Windows will remove them. The process usually takes one to three minutes.
If Disk Cleanup does not appear or you prefer a more direct approach, you can delete temp files manually. Close all open programs first. Then open File Explorer, paste this path into the address bar at the top: %temp% and press Enter. A folder will open containing your temporary files. Select all files in this folder using Ctrl+A, then press Delete. Windows may tell you that some files are in use — click "Skip" for those and delete the rest.
How to delete temporary files on Mac
Mac stores temporary files in a hidden Library folder that does not appear in Finder by default. To reveal it, open Finder and click the "Go" menu at the top of the screen. Hold down the Option key on your keyboard — the menu will change and show a "Library" option that is normally hidden. Click Library.
Once inside the Library folder, navigate to the Caches folder by double-clicking it. This folder contains temporary data from programs you use. You can delete the entire contents of this folder safely — select all files using Cmd+A, then drag them to the Trash, or press Cmd+Delete. Empty your Trash afterward to permanently remove the files.
You can also check the Logs folder in Library, which contains temporary log files from various programs. Open Library again, find the Logs folder, and delete its contents the same way. Unlike Caches, you may want to keep recent logs if you are troubleshooting a problem, but older logs are safe to remove.
What to do if you cannot delete a temporary file
Sometimes Windows or Mac will not let you delete a temporary file because a program is still using it. This happens most often with browser cache files or files created by programs running in the background. The solution is straightforward: restart your computer, then try deleting the files again before opening any programs.
If a file still will not delete after a restart, it is usually safe to leave it alone — it is taking up minimal space and the program will overwrite it the next time you use that feature. Do not force-delete system files or files you do not recognize, as this can cause programs to malfunction.
How often you should delete temporary files
Most people benefit from deleting temporary files once every one to three months, depending on how much you use your computer. If you browse heavily, edit large files, or install programs frequently, monthly cleaning keeps your storage from filling up. If you use your computer lightly, every three months is sufficient.
You can set up automatic cleanup on Windows by opening Settings, going to System, then Storage, and turning on "Storage Sense." This tool will automatically delete temporary files and recycle bin contents on a schedule you choose. Mac does not have a built-in automatic cleanup, but third-party tools like CleanMyMac or Gemini Photos can do this if you prefer not to delete manually.
The difference between temporary files and other files you might delete
Temporary files are different from your Downloads folder, Recycle Bin, or browser cache — though all of these can be cleaned to save space. Your Downloads folder holds files you intentionally saved, so you should review it before deleting anything. Your Recycle Bin (or Trash on Mac) holds files you deleted but can still recover, so empty it only when you are sure you do not need those files back.
Browser cache is similar to temporary files but stores web pages and images from websites you visited. Clearing cache logs you out of websites and removes saved passwords, so decide whether that trade-off is worth the space you gain. Temporary files, by contrast, are never something you chose to keep, so deleting them carries no risk.
Frequently Asked Questions
Will deleting temporary files slow down my computer?
No. Temporary files slow down your computer when there are too many of them, because your system has to search through them. Deleting them makes your computer faster, not slower. Programs will recreate temporary files as needed the next time you use them.
Can I delete temporary files while programs are open?
You can try, but Windows and Mac will skip any files that are currently in use. It is safer and faster to close all programs first, then delete the temporary files. This way you delete everything instead of leaving some behind.
What if I delete a temporary file and a program stops working?
Restart the program — it will recreate the temporary files it needs. If the program continues to malfunction, restart your computer. Temporary files are never required for a program to run; they only speed up specific tasks within the program.
How much space will I free up by deleting temporary files?
This varies widely depending on your usage. Light users might free up 100 to 500 megabytes, while heavy users can free up several gigabytes. The Disk Cleanup tool on Windows shows you the exact amount before you delete, so you can see what you will gain.
Is it safe to delete files in the Temp folder if I do not recognize them?
Yes. Everything in the Temp folder is temporary by definition — if a program needed it permanently, it would not be stored there. You can safely delete any file in the Temp folder without checking what it is.