It would be nice if when a simulation is started a subfolder, in the file location, is created and all the data files are stored there. This way each subcase or different analysis has its own folder to go to rather than making the main file location bulked up. This would also allow for multiple simulations to be run at the same time on the same file and would keep the data files for each simulation, rather than nastran in cad over writing the already existing files.