XB1 Reach Ltd Ed. disk install error

Tried installing Halo Reach Limited Edition disc on XB1 last night. I kept receiving an error message saying that even though I was using an external hd, I needed to free up 0kb on the internal drive. Um…am I missing something here? I have dozens of gigs open on both drives so what gives? Any help is appreciated, thanks in advance!

I’m curious to see if anyone else is having this problem.

Mine did fine.