In my more paranoid days I wrote a simple lisp routine to save the file to the project directory on the server ( normal qsave) and to save the file to a similar path on my C drive. It works well and doesn't take much more time than a normal save on the 1 to 4 mb files I usually create. I did this for years and never needed the extra file. If a file did become corrupted (only once or twice) both files were corrupt and hence my dual saves did nothing. I don't trust autosave, I simply save often, often, often. It is such a habit that I never stand to lose more than a few minutes of work. Prior to certain commands I will always save, plotting, 3dorbit, shademode, to name a few.