My hard drive just broke and I lost my city. I want to start build one, but this time I'll make a back up file. The problem is I don't know which file I should make the back up??
Choose your back-up method, whether it be another hard drive in your computer or network, online storage, or a CD.
Open Windows Explorer.
Open My Documents.
Browse to: \SimCity 4\Regions\ [C:\Documents and Settings\USERNAME\My Documents\SimCity 4\Regions\ is full folder path with Username being your Windows account name]
The folder names will be the title of your region. Copy the regions you want to save to your back-up source (CD, external hard drive, etc.)
Remember to back-up your "SimCity 4" cities regularly. The more often you play, probably the more you'll want to back-up.
This what I got from browsing in the internet. but it doesn't work. Please advise Thanks