Free sd card delete programs

need some help clean my sd card so i do not have to buy a new one

https://www.sdcard.org/downloads/formatter_3/

Deleting the files from the computer system simply does not mean that they have been deleted permanently. They can be recovered from the Recycle Bin or by using some backup recovery program by some hackers or some unauthorized persons. The tool Kernel File Shredder helps in permanently deleting the vital information or database records of organizations from the client’s network. To know more visit http://www.fileshreddersoftware.com/