Installation Directory Issues

Hello,

Recently I bought the napoleonic wars add-on and I'm trying to install but keep running into issues. Despite choosing my D: drive as my preferred path (which has 200 gb free), I notice that during the installation the files are being installed to both my D: and C: directories. This being the issue that my C: drive only has 900mb free.

What seems to be going wrong here? I've downloaded the latest edition of the installer as well.

Thanks!

Napoleonic Wars is considered as a module, it must be installed where your Warband game is installed.
Example, if you got it installed at: I:/Program Files (x86)/Mount&Blade Warband, then, it must be installed in I:/Program Files (x86)/Mount&Blade Warband/Modules/.

Also, yes, nearly every programs installs some light data in C:/ drive when installing.

My Warband game directory is located in my D: drive as well, so I don't think there should be any issue.

I understand there need be light data installed in my C: drive, but it should not be filling up 900mbs worth.