Reformat my WD 10EADS external harddisk from NTFS to FAT32

I downloaded the WD software to get back to FAT32 from NTFS. This program however tells me that the drive is too small to reformat with this software.

This is the message: “Error: Drive is too small or not supported! (WD10EADS-00L5B1)”.

What can I do to get this drive reformatted to FAT32?

What OS?

If windows, just use the built-in disk management tool.

Thanks for the quick respons!

I use 3 Windows environments: Vista, 7 and 8.

Is it possible with all three of them? Or is there a preference for one of them?