So, let's get this clear. You've got three HDs: one with AntiX, another in the computer, and a third external. Is that right?
If so, we need to have the two extra drives mounted: added to the file system. If you use the command "mount" in a terminal, it will show you what's currently mounted, with entries like
/dev/sda1 on / type ext3 (rw)
You need to get /dev/sdb (slave) and /dev/sdc (external) mounted somewhere; on my system they'd go in /media/--- unless I decided to put one somewhere useful like, say, /home/david/videos.
The drives may be mounted and show up with the mount command; then you can access them with the file manager. If they aren't, look in the configuration or system section of the menu, you might find a place where you can set drives to mount automatically.
If AntiX won't mount them automatically, or if you want to get them mounted where you want them, rather than where AntiX wants them, you need to edit /etc/fstab. That has entries like
/dev/sda2 /home ext4 defaults 1 2
That means the second partition of the first drive is mounted on home, it uses ext4, and it's automatically mounted in read-write mode. So you can add or alter entries to get things like
/dev/sdc1 /home/---/videos ntfs defaults 1 2
Of course, if you want to use a directory of your own choice, you do need to create it first.
As for the printer, you need to tell us what model you have and what you've tried to do so far.
Last edited by DavidMcCann; 09-18-2014 at 12:15 PM.