Not sure what Logical means, but Primary is your main Drive, Unhidden and hidden refers to files stored on your computer, every computer has some hidden files that Microsoft puts in there. You Might want to give more information on what you are trying to do? Copying a drive to where?
As mentioned , primary partitions are drives for loading the operating system,logical drives are non operating system partitions for loading your programmes.
Hidden and unhidden refers to a system whereby you would normally load more than one operating system for dual boot etc.
In this situation there would be 2 or more primary partitions one for each system.
Depending on which one you boot to, the other(s) would be hidden to save confusing Windows .
Bootmagic (Partition Magic) therefore hides and unhides partitions on multiple operating systems automatically depending which one you load.