I've finally got my wdmycloud set up and have been trying to clear space on my iPad to update its iOS and also update Artrage etc as it's available space so low my apps are crashing.

I finally got 1gb free went I to Artrage and deleted about 3 different artworks I had finished with. Went back to my settings only to discover I now only have 950mb free space left.

I closed out art rage etc. Doing the double click thing and that hasn't helped. I'm not sure why it would do this? Surely getting rid of files in the app would I fact free up space?