When I download the unity installer, right when it gets to 504 MB it says insufficient. What is this and how do I fix it?
Sounds like you don’t have enough free space on the hard disk partition you’re downloading the installer to. Try downloading on a different partition or free some space on your current partition (probably C: if you have the default download folder settings in your browser).
Just means you are downloading the installer to a drive that has basically no space left