Split Hard Drive Partition

I have used gparted for many reasons especially since it is free and works when IO controller drivers are not available like disk director, partition magic, and others.  Gparted also supports RAID configurations.

You are going to have to reduce the size of the 2nd partition and then created the new 3rd partition.  

Doing the check disk first is great idea also - For the C:\ drive: chkdsk C: /f
Run it against the D:\ or the drive letter of the 2nd partition also.

It is also to run check disk against the reduced partition and the new partition after the reduction and creation of the new.

>>  Is there a good application to use so I can split the 680 GB partition into 2 without having to re format the hard drive?   <<  sure there are - BUT don't forget it is wise to have a backup BEFORE starting to change the drive layout; 1 problem, and your data is at risk

personally, i use the Bootit-BM for that(free trial) :  www.terabyteunlimited.com/       
but gparted will work as well

here is how it is done :
first you boot from the bootit cd - do NOT install it on the drive -hit Esc
select partition work, and the 680 GB part, looking like  66666666666666666 6 represents the 680 part)
now shrink it, to make free room for the new one, so it looks like 6666666FFFFFFFFFF (f = free space
now make a partition with the Free space

Second Easeus.
Used it with no issues.

I would suggest Gparted too. It is also available packaged as a live CD, called Parted Magic. And it's free (and open-source).

Thanks all ..
I wound up using the Windows 7 Shrink Volume feature , worked for now.

But will keep all these ideas in mind for the future.

Thanks again...