H Akhi - Comments

Macbook user here.. downloadedd the 18gb file on my computer but because of the space of my laptop, chose to change the graphics data location to a usb flash drive.
My problem is I have a 64gb usb 3.0 flash drive and about half way through copying the facepack it says "disk full not enough space" - usb actually says that all of the 64gb is used up. Dont understand why its happening when it shouldnt even take up half the space, Ive tried the format to exfat, disk utility (erase) method etc still keeps happening. Any ideas what to do?