Wallet.Dat is the file that contains the keys to your BitRaam on the block chain.
We advise making a copy of it onto another storage device, at least every month, for safety, in case your computer's hard disk malfunctions. We don't want anyone to loose their BRM.
Windows:
1. Start
2. Run
3. %AppData%\BitRaam
4. You will see the Wallet.Dat in this folder.
5. Copy
6. Paste onto another drive.
MacIntosh
steps coming