I am having serious problems trying to format my new 4Tb portable Seagate hard drive to Fat32 or exfat with a Master Boot Record Scheme. I have tried on my mac using disk utility, however, when partitioning almost all options are grayed out. I tried using windows, and have run into similar issues, and most of the time can only format to NTFS. I have gone through customer support for Apple and for Windows and neither could help me. The apple tech support said that if I used an old version of Disk Utility before they changed it, then I could solve my problem. Does anyone know how to do this?