I have a 120GB HDD and I got a file on my computer that is 5GB. (.iso). My friend want that file and I'm going to transfer it to him. But when I dragged the file to the HDD it was an error. It is a Fat32, and I found out I can't transfer files bigger than 4GB to it. So I tried to convert it to NTFS but I couldn't drag the files to the HDD. So what should I convert the HDD to so I can drag as big files as I want from my Mac to my HDD? Edit: My friend also have a mac, so it doesnt need to work on both Mac and PC, but it would be cool if it did!