Partition Magic Unlimited Edition is developed for users to manage company server stations with ease. Those may free free to :
Here we did a test on Windows Server 2003 to extend disk without data loss. You should download a free demo to try this one and then follow our guide.
1. Launch Partition Magic Unlimited Edition, right click the drive which is "BIG" that holds too much space and you want to redistribute the partition space from it, and choose Resize/Move.
2. Drag the partition rightwards
3. Resize/Move the system partition with the unallocated space.
4. Click "Apply changes".