I am using a LaCie d2 quardra 750 external on my Win XP. F drive on the lacie is Fat32 and used for almost nothing. H drive on my Lacie is NTFS and is my backup of my PC and thousands of digital images. I will hook the Lacie up to an iMac soon via firewire 800. If I copy the data from the Lacie H drive(NTFS) to the main drive on the iMac, will the digital images be read only or fully editable? Or should I reformat the Lacie to Fat32, do a backup from PC to the Lacie then transfer images and data to the iMac?? If these images and data now on the iMac are fully editable, I will then reformat the Lacie to HFS+ for the best performance on the iMac knowing that it will not work with Windows.