It simplifies backups. You no longer need to search and sort your other drives for particular files. You can create a drive for sensitive files, then hide the drive using Partition Magic. By partitioning your hard drive you limit the area that will be affected if you're attacked by a virus. Most virus programs attack the boot sector of your hard drive.
Some viruses attack most any file that changes or is executed during a computer operation.
You can change the size of any partitions without affecting the files. As your needs change, you may require different size partitions. It will support up to eight physical drives. It does not affect your basic OS partitioning scheme. There is no proprietary software involved and it is operated from a floppy disk.