Photoshop won't install

While they may have installed ok in the past, I suspect you had more than enough room to install at the time.  If you add up the complete installation of those programs, you need: 4GB (Photoshop), 2GB (lliustrator), 8GB for Premiere Rush.  So that is 14GB.  Can you move your working files to your external disc to free up space to keep the apps on the HDD?  

So i had Photoshop CC, Illustrator and Rush all installed on my laptop. I unsinstalled them all 30 minutes ago attempting to install the on an external hard drive. That didnt work! ...

By @susant81513045

Why didn't it work? Do you got an error message?

Do you tried to install it in the root path?

This doesn't work. You can install Adobe apps only in an sub folder.

How to change the install location of your Creative Cloud apps (adobe.com)

Even if you manage to install it, you will soon run into performance issues because of insufficient hard drive space for Windows updates and system and temp files.

It's time for a larger internal drive.

I don't think 8gig is enough for the download & install process... move data files to your external and try again