the title says it all. I have a 300gb external drive with 2 NTFS partitions with important information on them. Is there a way to add a HFS/HFS+ partition to the drive without removing, or corrupting/damaging the NTFS partitions (the NTFS partitions were made in Windows XP)? When I try to create a new partition using iPartition, it says: iPartition could not find a partition map on this drive. This may be because the disk is empty, or it may be because the partition map on the disk is not in a format that iPartition recognises. To create a new partition map, select the type of map you require and click "Create Partition Map", below. It gives me the option to choose either Apple or GUID partition map types. I don't want to screw up the NTFS partitions already on the drive. Will creating an Apple Partition Map erase the Master Boot Record (MBR) made by Windows?