Hello all, I have an iMac on order and I'm switching from PC to iMac. I have a Seagate 1tb external hard drive to backup files from PC to move to iMac. However, I want to continue to use the same Seagate to backup a Windows laptop. Is there a functional (without much ongoing effort) method to use the Seagate for iMac and PC? Or is buying another hard drive better. Looking into formatting Seagate as FAT32 to see if it works. But have some faily big video files approaching 4gb.