Definition of Disk Usage : " Disk Usage is how much data is being written/read on your storage device. If you download at 5Mbps it has to write 5Mbps to your HDD/SSD to store it." If your Windows 10 or any other PC has eased back practically to a stop, however, you have not very many projects open, something might make your hard roll over-work. This is an issue since when your PC's hard drive is always working at or close to 100%. It won't have any extra ability to perform different errands, even routine working framework assignments. This backs everything off and can make your PC absolutely lethargic. This is a moderately normal issue in Windows 10, yet fortunately, it's generally not a difficult issue to settle.