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How to fix Windows 11 system using too much data
Noticed that free space on the main drive has been shrinking steadily ever since upgrading to Windows 11, even without installing anything new. Started with a decent amount of breathing room but now ...
Delivery Optimization is one common reason Why is the system using so much data in Windows 11, as it lets your PC upload and download updates with other devices by default.
How to Fix Why is the system using so much data in Windows 11
Step 1: Open Settings → Windows Update → Advanced options → Transfer Optimization
Step 2: Turn off Allow downloads from other PCs
Step 3: Run Disk Cleanup and delete existing Transfer Optimization files
Pros
- Prevents peer-to-peer uploads that waste bandwidth
- Frees up 1–10 GB of cache files
Cons
- Disabling this feature may slow down future Windows updates
Important Notes
- This setting is particularly important if you have a metered connection.
- After disabling this setting, run Disk Cleanup to completely remove any leftover files.
- This will resolve the issue of excessive data usage in Windows 11.
This is a quick fix that effectively reduces unnecessary background data usage while freeing up valuable disk space.