There have been an awful lot of people posting about crashes and data loss recently. It surprises me that people can go hours without a save. Anything more than a few minutes and I start to feel that twinge of intrepidation at each mouse move. My PC is very stable and it never crashes unless it completely dies and need some hardware fix and yet I still never ever treat pending work as safe.
Backing up is a good idea. Naturally. But its always easier to say that after the crash and burn than thinking about it before hand. But really - it is worth it.
So when making a map I don't keep saving over and over the same file, I save map1.png then map2.png then map3.png etc. My last months challenge had Inn38.lwo as a filename... this is my first line of defense.
My PC has two HDDs which are not RAID'ed but I have them so that one is a clone of the other. I have a script but really its just one line that copies everything from one HDD to the other. If you have the same filename then it overwrites but if you delete a file then its not deleted on the clone. So sure you can mangle a file then back up and the back up version will then be mangled too but I find that I usually know when its mangled so I can fetch the clean version from hdd2 and put it back on hdd1. I run this script every few days. This is the amount of time of work lost if the HDD packs in without warning.
About once a week I copy my working HDD to an external HDD. So thats how much I lose if my whole PC gets zapped and all HDDs get wiped.
Then really critical stuff gets put to DVD and stored but thats about every 6 months. Thats my last resort if the place gets burned to the ground.
So these scripts - complicated ? No not at all. Just make a batch file and put a command line in like this :-
to copy all your C drive to E. Takes a while first time you run it but its a lot faster subsequently. I put these bat files in at the root of each drive I want to copy. There are better solutions out there but I doubt they are as simple. One thing I like about this way is that I can verify that its all backed up properly. Theres no database or other system in the way of my copies.
xcopy C:\*.* E:\ /K /O /X /E /Y /D /C /R /F /H
All I can say is that this works very well for me but just find something that your happy with. Pretty sure that there is a mac version of xcopy. I know that there is an open source xxcopy which has even more options. I would imagine that it exists for the mac.