How big is the zombies download for Call of Duty: Advanced Warfare?
Solution 1:
Havok is reported to come in three separate downloads, for a total of approximately 15GB.
3 file sizes on PS4 at 5.43 GB, 5.42 GB, and 5.62 GB.
Source
There seems to have been quite the problem with the 3 download files taking several hours on end to download. I do not have any first hand experience with this issue but I cannot say for sure.
File download sizes
Although this is in the case of a PS4 I believe that the file sizes will not change between the consoles. So expect about 15GB worth of downloads.