http://y7yea4pmqqtznb33qiugvysyn2bob5v62e4pvoadoibrwkq3tsddjeyd.onion/zh-hans/module/how-delete-your-data-securely-windows
The English version may be more up-to-date. Secure deletion only works reliably with spinning disk drives and not solid-state drives (SSDs), which are standard storage drives in modern computers, USB thumb drives, and SD cards. If you purchased your computer after 2015 or so, it more than likely has an SSD.