iPad Storage

Angus

I am an oldie in need of SIMPLE help please.My iPad was running short on storage despite me deleting what I didn't need.I pay Apple £14 /yr for extra storage but now find I do not know how to utilize this extra space,when I get the message NOT ENOUGH SPACE as at the moment when there is an OS UPDATE available from Apple.HELP!PLEASE.

Victoria00

Maybe a simple reset will help.