So I have an external HD that is currently one big partition (FAT32). I want to split it up into two partitions, one FAT32 and one Mac OS Extended. However, I have a lot of data on it now that I don't want to lose. Can I use Disk Utility to split the drive into two, creating a second Mac OS Extended partition without losing any data? Will it just resize the FAT32 partition and create a new Mac OS Extended partition, or does it format the entire drive then create the partitions? Thanks!