Share storage capacity among individual users and deny access to other hard drives?

Hi,

I have the following problem: I have two hard drives, each with 1 TB, in my PC, but I would like to create another user who has no access to one hard drive and only a certain amount of free space on the other.

As far as I know, you can divide the storage capacity between users when booting a hard drive, but is that also possible afterwards?

I'd simply like to add another user who doesn't require much storage and doesn't have access to my files. Of course, I could also create a new volume using Disk Management and simply assign it to the user. But I don't know how to do that.

Thank you in advance.