documents

Hi, I have the app Notability for IPad Air 2. I was trying to import some files for school, and not knowing which file extensions Notability could read, I attempted to import a .htm file, as well as a document I made in Apple Pages, and saved in the "pages" format. The files would not open in...

Full disclosure: I am a total Apple newbie. This iPad Air 2 is the only Apple product I've ever used. So on PC and Android if I download a document it goes into my documents folder. Where do downloaded documents go on the iPad? How do I locate recent downloads? I promise I did search the forum...