Boot Camp only supports 64-bit windows installation. Trying to Install windows 10

After I enter the Command into the terminal (copy+pasted so I didn't mistype) it tells me no such file is found though I am staring at the file right in front of me. I checked to make sure file name was the same and Win10_1511_English_x64.iso is definitely the name of the file. Does this mean my computer is unable to recognize the existence of this file? I also tried pre and post mounting, don't know if that would have any affect, but I tried it anyway.

I included the file showing that I do have it as well

Alright, I have now confirmed that the values do match, but after moving the file into documents and running bootcamp, I get the "only supports windows 7 or higher" message. Is it possible the destination disk is the problem? I was using a cheap usb drive that had nothing important on it because bc told me to plug in a usb. I didnt realize at the time that the destination disk was that usb until today when I plugged in an external harddrive that was given to me and that became the new destination disk. The problem still persists though, even though I have installed the mac drivers to allow me to write data onto the drive.

If its possible, I would like to make the ext harddrive a bootable windows drive, but being able to boot windows at all should be priority.