XF 2.1 Copying Node Files

[AngelArs]

I have to reinstall my entire forum because it has an issue. It is a new forum with no members or threads. However I'd like to be able to make a copy of all my nodes and forums so that I don't have to manually retype everything in again. What file or files should I be making a copy of before I overwrite everything on the server?

 

[Steve F]

What type of an issue is it that requires a fresh install?

 

[AngelArs]

XF 2.1 - Cannot setup styles

I have a new install and was trying to setup my logo. When I was in Styles > Header and navigation I went to click on save and received the error shown below. I turned off all add-ons and the error still shows. No other types of error messages are shown in browser. I checked and I get the same...

xenforo.com

I would like to know which file(s) contain the nodes for general knowledge anyways.