Does anyone know how to make a backup for your map. What files do I need to save in order to make a backup?

Use tom map packer . It can be found at his site. The files that you need to save it depends on your map. If you using custom xmodels then you need to save that model images , material , materials_pro , xmodel file , xmodelsurfes , and the last thing i don't remember it lol. If custom images then you just need to save the images , material , materials_pro. Etc.

I use svn, shown here, and have a constant backup that way every time I commit. But I also backup the entire cod folder (over 25 gb) on an external drive periodically. I just feel safer that way. I also have a program, We-Pack, that will grab all the models and things for the models out of your map for you, if you go with another method and need that...

press Ctrl+c on the map, then Ctrl+v on another harddrive, i use this all the time and it takes around 1 second.
Alternativly you can have 2 folders open and drag map across while holding Ctrl making a duplicate for backup also 1 second.

Thank you all