Xcom 2 + War of the Chosen

[pakrat2k2]

wit, you should know by now how to edit ultraarc.ini.

the issue is the 2 highlighted items

[Split]
FirstVolumeSize=4470
CustomVolumeSize=4480
ThresholdPercent=5

Firstvolumesize is wrong, Setup files take up 21mb, so that number should be 4480-21=4459... more correct for you 4475-21=4454
You always seems to have issues with that 1mb over so reduce Customvolumesize->4475
ThresholdPercent=30 ( using 5 makes a ton of files ) that why I always choose 30, with more then 1 dvd5 output. IF equals 1 dvd5 output then you can use 100.

In your version of xcom2 was there AMD Dual Core Optimizer, DirectX, VCREDIST, OUTSIDE of _Commonredist folder as well ?, if so delete those 'extras' not needed.
AMD Dual Core Optomizer, would only be needed if running on older XP dual core system, NOT needed on anything newer then that. Could include the files just to be complete.