How to Securely Delete Big Files/Folders in Windows 10

By Achilles Hill | Last Updated January 03, 2024

"I just deleted a big file that is 5 GB in size in my Windows 10 desktop and the deletion only took about 10 seconds. Why is it so fast and is my file deleted securely?"

When you delete the big files/folders in Windows, it doesn't erase your data immediately. To enhance the work efficiency, Windows will release the space of the deleted data firstly and make the deleted data remove permanently through the new data's overwriting. In other words, your big file or folder isn't deleted securely with the quick and simple deletion.

To delete the big files or folders securely, which means that make the deleted files/folders unrecoverable, using a third-party tool is worth considering. And here we will take iSunshare File Deletion Genius as the file eraser to show you how to securely delete big files/folders in Windows 10.

securely delete big files or folders in Windows 10

4 Steps to Securely Delete Big Files/Folders in Windows 10

Step 1: Free download iSunshare File Deletion Genius and then install it in your Windows device.

Step 2: Open the software and you can add the big file or folder into the software with the Add feature. It's also available to input the big file/folder by drag-and-drop, which is convenient when the unwanted item is in the desktop.

select big files to delete

Step 3: Select the deletion mode: Fast Mode or Slow Mode. Both of them can delete the big file permanently, so you can choose the one you prefer.

choose deletion mode

Step 4: After that, just hit the Delete button to begin forever erasing your big file/folder.
Note: The deleted big files/folders cannot be recovered with any way or tool!

begin deleting big files