I have this: http://www.simpletech.com/content/signature-mini-espresso-120-gb A 120GB external hard drive and the formatting options are NTFS & exFAT. Currently it's NTFS. I also have this: http://www.overstock.com/Electronic...e-U3-USB-2.0-Flash-Drive/2996146/product.html A 512MB flash drive with the formatting options FAT32, FAT, & exFat. Currently it's FAT. ---------------------------------- Okay, so here's my question, I am a new Mac user. My MacBook is on it's way to me as I type. I want to use both my flash drive and my hard drive with both my PC and my MAC. I've done a ton of reading in this topic but I need a straight answer. hah. I have used my Flash drive on a Mac yesterday at school and it worked fine. I opened files, created and saved files to it and then opened them up on my PC. So does this mean I can leave it formatted FAT? I haven't tried my hard drive just yet, but I've read every where that the current format it's in can't do what I want it to do. I need to save to, open, edit, etc between both my PC and my Mac. halp!