Rob
Ansys Employee

One trick with CAD and other modelling software is to save files with 01, 02 etc in the filename as you work through the design. If you make a mistake in (for example) 09 and notice later that it's corrupt in 14 you can go back. Autosave is only good for some cases and a limited number of steps. It's a technique I use as I historically have been dealing with corrupted files and regularly need to back track to try something else.