What is the OS you are running on? If windows you can use explorer to copy it. Got to start and click on computer or do it from the desktop icon. Depending on the version you basically select the drive it is on and double click it.
That opens a folder/directory for that drive. Scroll to you find the one that has the saves. In Win7 that will be the program files x86 (if install as admin) on XP it will be just program files.
Scroll to you find the version of civ, Infrogrammes for C3C. drill down till you get the saves folder and select the file. You can right click it and select copy. The slect the device you want to copy it to and paste there.