Save a file on to your computer/whatever. Then go onto the "draw animation" page and click the gear on the botyom right. A little menu will pop up from the gear. At the top of the menu, there are two pieces of paper with one having an arrow going up, and another going down. You want to click the one that's going up. From there you should be able to select the file you saved. I have no idea if this works, as I haven't tried it myself. However, that is how I hear it works.