record a stick full of new files over them ?
deletion as someone has pointed out just means ripping off the tag ( doc jpg) etc and then sending them out into space so they can be recovered by determined people
I use an eraser program for personal files because I kinda take the fata protection act seriously
( reccyled over around fifteenyears ) - the program overprints random letters over every space in the file to be deleted. result - zapped good !
doesnt look a hundred miles from
https://sourceforge.net/projects/eraser/
freeware ( the URL I have given I HAVEN'T used - as I use an old one )