I have an external 300GB USB HD that I use to store all my important data. The problem is that it is formatted in NTFS since I carry it with me to work (xp computers) so I can't write anything to the drive from my MBP (OS X). I have another external, mac formatted drive but sometimes I would just like to put everything in my larger one (300GB) for convenience to carry with me... Is it possible to split up the HD into a mac partition and another in NTFS? I don't know if I can make all the HD FAT32 because I have files larger than 4GB and I heard FAT is not good with bigger files. Ideally I would like to change nothing because it would take me forever to move back and forth my data. Is there not a program someone can purchase to be able to write to NTFS from OS X directly. It is annoying having to go to Windows everytime. Thanks for your help!