This is the most helpful reply so far. Thanks. But what does...
....mean? I can select what, exactly, from the drop down menu? I have no idea what a "mount point" is, so I'm not going to know what to choose.
Thanks.
What he means is this. Mount point simply means what you want the partition to do. In linux you can have multiple partitions all doing their own job but still be part of the the whole system. So you can have one simply for /home which is where you store all your personal stuff.
Check out this link.
When you double click a partition, or create a new partition, it comes up with a dialog box (see above) with some options in it. Set one to EXT 4 (this is the file system) then click format then set mount point to / (root). This will configure the partition to be used for everything to do with the OS.
This is how my current setup looks. I have just opted to keep things simple considering I have a secondary HDD for backups and such. As you can see I shrunk the Windows 8 parition down and created a 8gb swap partition and the the rest I used as /.
Sorry my earlier post wasn't more helpful. It was something like 2:30am and my brain was fuzzy after getting up to feed my daughter. Basically what I was aiming to say was simply that having 2 or more HDDs can make it a touch more difficult. The installer, from the pics you posted showed, thought it would be more appropriate to shrink the spare HDD and allocate space to Linux on there. Thus preserving the Windows HDD. The drop down at the top would have let you select your primary HDD and do it from there anyway.
The installer is easy if you let it help you. But, much like Windows, if you have multiple HDD's it can make the process a touch more complicated or if you're wanting to do a dual boot situation. My suggestion to remove the backup HDD from the equation was simply a suggestion. I just know from personal experiences what it is like as a new Linux user to try and install it. It's not difficult, especially with the mordern *buntu installer, but it can be a bit of a learning experience.