How to fix Windows 11 system using too much data

Delete Temp Files Manually is a simple way to address Windows 11 system using too much data by clearing cached temporary files that can cause bloated disk usage and background overhead.

Instructions: Press Win + R, type %temp%, and press Enter. Select all files with Ctrl + A and delete them. Press Win + R again, type temp, then delete all contents in the folder. Finally, press Win + R, type prefetch, and delete all contents there.

Its advantages include requiring no extra software, being quick to perform, and automatically skipping files currently in use, making it a safe way to free up space.

Its drawbacks include only addressing cached files, not the root cause of Windows 11 system using too much data, and needing to be repeated periodically as temp files rebuild over time.

ps

• Be sure to close all background applications before deleting files to maximize the number of items that can be deleted.
• Do not force-delete files marked as in use; these files are required by running programs.
• Do not completely delete the Prefetch folder—simply clear its contents, as Windows will automatically rebuild the necessary files.
• This cleanup operation only frees up temporary space; it does not resolve persistent high data usage issues caused by applications or background processes.

This allows you to free 1–5GB of disk space quickly. It is suitable for routine maintenance, helping to keep your system running smoothly and reducing unnecessary background resource usage.