Last night I installed to most of my sites K2 but then got a red flag warning from my hosting company that I was approaching my iNodes limited. Does K2 double articles on a site? If so is it safe to delete the old files?

Thanks in advance.

Hello,

K2 doesn't double articles. I suppose you have imported all your existing articles from joomla to K2. It is safe to remove the old ones from joomla when you are certain that you have nothing (menu, module, etc.) pointing to your old content.

Don't forget to get a backup first, though.