Question: how do i save a pdf on my ipad?
Answer: Open the PDF on Safari (the web browser).
Click the arrow at the bottom of the screen.
Swipe through the available options until you see 'Create PDF'.
After a PDF has been rendered, click 'Done'.
Click 'Save File To…', choose the location and click 'Add'.
Voila, your PDF file will be stored in the designated folder.