My iPad's been buggy lately and I think it has too little memory. I use it for art and it takes like a full minute to load a single undo, maybe a few seconds to switch between layers, and it on a rare occasion corrupts my files now. Not to mention opening the app without first turning my iPad off and on again is rather unlikely, and that is even worse when I have to switch between it and a reference photo or something 'cause then the drawing becomes impossible.
I can't upload pictures onto my computer the traditional way and the only way it works is via emailing or posting them to Facebook or... "Flickr," was it? Some Yahoo's photo sharing thing? In any case they upload maybe at the speed of mud, once a minute, so that' snot a viable solution.

I just deleted over six hundred reference photos off my iPad that thankfully were mostly used or otherwise not that good anyhow. I hope this helps but I may need a new iPad soon. Or some other method of drawing.

Edit: The purge seems to have helped... A bit. And either way I have a small backlog to post from!