Sometimes, when you receive a 'Low Disk Space' error pop-up, you might ignore the warning message or try to disable it for permanent. 6. Transfer Large Files to An External Hard Drive.Extend Low-space Drive with Space on Another Drive Combine Low-space Drive with a Neighbour Drive Here are some ways to fix this error for you to try: If your PC is with low disk space error, you can't install a new Windows update, and the PC's performance may be affected. List of Ways to Fix Low Disk Space in Windows 11/10/8/7: