So I just did a fresh install of Windows 10 Pro 64 bit onto my pc due to issues upgrading and was trying to download FF14. I downloaded the 107 MB ffxivsetup.exe file from the official site, but when I open it it says "you do not have enough hard drive space. you need at least 2 GB of free space in my documents"

The thing is this is a 500 GB hard drive with a fresh install. I have over 400 GB free. I have no idea what's going wrong, but if windows 10 is the issue I'll go back to 7 if it means I can play this game. Anyone know what I can do to fix this?