I am running Linux Mint 19.2 on my desktop. I also installed a second internal hard drive. I want to create a second user account (which I know how to do), but set up the system in such a way so that only the administrator (my account) can access this second hard drive. The second user should only be able to access the hard drive on which Linux is installed. Can anybody tell me how to do this? I need step by step instructions, please.