When you delete a folder or file from the hard disk,it is permanently deleted immediately,and unrecoverable.

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When a file or folder is deleted from the hard disk, it is not permanently deleted immediately. Instead, the space it occupies on the hard disk is marked as available for new data to be written over it. Until that happens, the deleted file or folder can potentially be recovered using specialized software designed for data recovery.

When You Delete a Folder or File from the Hard