I have a MBP that i backed everything up from to two external HDD's (in one enclosure). They are formatted NTFS (and i know thats the problem), but i am able to read/write from my MBP just fine. When i bring it over to the iMac, it'll read but won't write.. Read only permissions. I have 4TB worth of data, and no way to back this up to format the drive. I need another solution - does one exist? or am i forced in buying another 4TB worth of storage just to fix this problem?