... How much HD space do I need for the voice patch? T___T

I just got done aquiring the voice files, the other stuff needed, reinstalled Kanon, all that good stuff, set it all running and ready to go... and... after installing the voices for two characters (or not quite that) I ran out of hard drive space ;__;. I chose the 44100Hz option this time (figured it wouldn't be so big since the files themselves were only about 400mb total), if I chose the 22050 it would likely be smaller but only by about half, right?

I still don't know if I have that much HD space... can anyone tell me roughly how much free space I'd need for the voices? I think I can free another two gigabytes if I try...