Your operating system makes it a point to delete your files faster which is why you can still recover it eventually. This is because actually deleting the file and overwriting its pointer takes time since the system would have to overwrite its data. In case you really would lie to delete a file and all its contents, you can find a file shredding tool which can help you get rid of the file permanently. This is why you don’t have to worry about recovering lost data especially when you haven’t even gone to overwrite that same data using any their party applications.