well really good tip would be that if you want your drawings replace olderones, rename them exactly the same as the replaced ones, thats a good gurantee to get them the actually replaced. otherwise I migth miss something. I suggest not to go changing filenames unless the older ones are completely or clearly erroneous.
also, the SB has rather clear and existing
filename convention. Please, always use it. No ruling has been made that would allow all sort of deviations from these guidelines that has creeped around lately. last round I did qite lot of manual renaming of the files, but next time I will do it significantly less