How to download a file from My Files
Once you have found the file that you wish to work on / modify in My Files remember you can not edit it "live" from this area. You must download the file to your own device and edit it from there. Below is how you download a file from this area:
Find the file you need and then click on it to highlight it
Next at the top right click on Download - this should save to the downloads folder on your computer by default.
Find the file and copy/move it to where you can work on it.