Would it be a problem if I have linux installed on a seprate harddrive and have windows 10 on another harddrive?
Because I really do not want to **** up my windows harddrive while i'm using linux on another. Btw is it a really good idea to do this by basically changing the boot directory in the bios when i'm wanting to boot from the linux harddrive and when I'm wanting to switch to the windows harddrive I reboot my pc and switch the boot directory to my windows harddrive. Or is all this a bit redundant?
It might be annoying though. I've had to hit F12 on my machine to get to linux or windows separately but I also don't know how to set grub up for that.
If nothing else, take 20 GB on your SSD and set that as the root for your installation and set the hard drive you were going to use for linux and set that as /home. Very easy to do and only takes a minute to learn.
Yes, you can do that, what you can also do is, install windows on an SSD and Linux on a HDD (like you mentioned) and install a bootloader (preferably GRUB) on the drive you have set to boot from in your BIOS, so when you try to boot from that drive, grub will offer you to boot linux or windows even if there are on different drives.