There are two ways to do this:
If you have Prot-On install in your PC: Download Here
From the desktop on your PC choose the file that you want to protect, with a right click of the mouse select Prot-On and choose “protect”.
If you use Prot-On Drag´n Drop, online use (only for PDF, images, .docx, .xlsx, .pptx) : https://dnd.prot-on.com/
Select or drag the file that you want to protect in the window and it will be automatically protected.
