Hello Bud, You didn't say what partition had the most files on? If most of your files are on the NTFS partition, and their larger than the fat32 threshold over 4 gigs, then you will have problems moving them to your new resized fat32 partition.
There are things to consider and stages to follow moving files around when resizing and repartitioning drives, and even more to consider going back from NTFS to FAT32.
I would recommend if you cant store your over 4 gig files on other media, other than the 2TB drive, then take a total count up of the size of space you need to store them files, and create a NTFS partition just for them on the 2TB drive, and then resize the rest of the drive to fat32. I don't recommend using windows, or any app within windows to do any low-level work on a fat32 drive, use Linux. and use windows to do the drag and drop copying, from partition to partition.
There are a number of ways to resize without loosing data, and the easer way is to copy everything to another media, and then resize that drive to fat32 2TB drive then copy the files back.
If your unable do that, than I would download this: gparted.sourceforge.net/download.php and burn it to CD, then disconnect all drives from your computer, other than your CD/DVD/BDVD,and the drive your resizing.
Then boot from gparted CD into Linux, and resize that way. If you are unable to move files over 4 gigs to other media, and are unsure on how to go about moving them around safely, then let us know.