Security bug? Access files without password via mail-link

Thanks for your feedback! But i am really feel unsafe …

Is the the only way to make it a little bit (feel) safer, creating a “transfer”-folder with copies of the files I will sharing? And after that I delete the files in this transfer-folder?
In this way the created and via mail send link, will later be “dead” … I hope :wink:

Greetings
nick