Jest a gamer 27

No, I place the USB in the front of the case where the USB 3.0 slots are.
edit: edit: It used to work before when I didn't have my ssd

Thank you for your suggestions, I mixed and matched things that I liked or found to be better on your list and mine.

no. forgot how much more everything is in canida is like 10$ here

https://ca.pcpartpicker.com/product/93Crxr/cryorig-cpu-cooler-h7 

if you wanted to fully kill the old 10 install from your harddrive you could transfer all your files (EVERYTHING you don't want to LOSE) to your SSD or an external drive of some sort (depends on the amount of files you have), then just format the HDD, that will wipe it clean, then you can copy back any files you don't want taking space on the SSD, you don't "have" to unistall 10 from the HDD, it would just be about reclaiming the extra space, I did the delete the Windows folder from the HDD method after I installed Windows on my first SSD because at that time I didn't have an external drive with the capacity to hold all my files, frankly it doesn't make a huge difference.

Correct key is tied to the motherboard, I currently have 2 SSD's in my laptop which shipped with 8.1, I downgraded it to 7 when I installed my first SSD then returned to 8.1 when 10 was preparing to launch so I could take the upgrade then I reverted to 8.1 due to compatibility issues with my work software, then my HDD died and so I replaced it with a second SSD and then I installed 10 on that second SSD I can now choose which version (8.1 or 10) I want to boot to by choosing which SSD to boot from. If you keep the old drive (for safety I would disconnect it temporarily during the setup of the new SSD) you could have a dual boot system with 1 OS on one drive and another OS on the other like I have with my SSD's, just be sure to put any files you want to share between the 2 drives in a public folder, if they are just in your user account you have to do this whole "Take Ownership" thing which just takes a lot of time if you have a bunch of files.
 
that said once you get 10 on the SSD you could delete the Windows folder from the HDD to free up 10-20GB of space on the HDD, but you wouldn't be able to boot that drive to windows after that.
 
Also remember, a clean install means installing drivers and programs you use after installing 10 to the SSD.