I just got the Macally 100AC external enclosure and I've put my old PC hard drive in it (with windows still on it). The problem is that I can't change the permissions so that I can write onto the drive, only read. It's not a huge problem right now as I hope to reformat the drive when I'm done backing everything up, but I'm not sure if I'll still have that problem then as well. I assume I just use the disk utility to erase the external hard drive? What file system do I use, journaled or not? And when I reformat it will I be able to write to it? Thanks a lot!