I bought a new HD and I noticed from previous experience if I use it first on a Mac then I need to stick with Macs if I need to edit anything and vice versa with PCs. I was told there is a way to format it to work on both. Some sites say format to FAT but there is a size limit? I bought 1T hard drive so I went with exFAT assuming it's going to allow more space? Anyway, I formatted the thing on the Mac and it worked but when I took it to the PC, it asked me to format it again to N-something (forgot the exact format). There was no option to choose FAT or exFAT. The PC is running XP. So when I went back to the Mac I noticed the HD name changed and I can't do any editing anymore. Is there a way to fix this?