Themes not uploading

I downloaded the edu theme and when i move the file to the themes folder via ftp, it says the file is in there but in wordpressmu admin it’s not showing up.

I am fairly new at this but I have added other themes and have not had this problem. All the other wordpress themes I have used were actually folders that I moved over and edu is just a file. Should this be transferred differently?

Thanks in advance for your help!