Okay but there are a couple of things you need to know about 8. You will need to search the web for "Windows 8 shrink partition" because you cannot do that to a win8 partition from the external without damaging the OS. Print the instructions and follow closely. Before you do that though, you need to create a restore disk. For this I used Five DVDs with number five about 60 percent full and be sure to number them.
Also, before messing with eight download Magic or Magical Jelly Beans. This is an executable file and when it is executed an info window will pop on your desktop. Record the 5 sets of 5 alpha numeric code in the event you loose everything. The Key Code is not needed with the Reinstall Disk Set but if all else fails you can download a free Win8 iso file from MS for a fresh install and otherwise it can cost you over 200 for a new key Code and disk.
Now the one that just rips me to the point of hate. Remember mine is not on the Legacy BIOS, I am on the new UEFI and when I boot to the GRUB I must choose the Windows Loader and that erases GRUB so that the next time I boot into Ubuntu or Mint I must boot from the Live DVD, mount the Ubuntu Partition, bring up the Terminal with ALT, CTRL and T. then You must type update-grub. Shut down, remove the disk and reboot into the Linux. MS has really gone evil with this release.