I am working on a technical forum and would like to be able to add a folder with sub folders for knowledge base articles ie:

Windows Server 2012
Setting up firewall
Setting static IP
Installing and configuring

I hope you get the idea is this possible now or could it be added

I assume with folders you mean subforums for different topics? If yes you can do that by adding Categories with Forums ans Sub Forums for example...

Category A
...Forum 1
...Forum 1-1
.......Forum 2
Category B
...Forum 1
...Forum 1-1
.......Forum 2

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You can attach files to each topic but not organize them in folders

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