hi there, hope this doesn't seem like a totally ignorant question, apologies in advance if it is. I recently bought myself into the world of mac and mac air, to enable me (i thought) to enhance my photography hobby. today i hooked up my external hard drive only to find that i can only read the files, and can't save anything to the drive. so... do i need to save all the files on there to another drive and reformat this drive to suit mac, or is there a way to combine new files from iPhotos with the old files (from windows PC) tricky question? well it was for me! it took me three days to enable my epson printer to accept commands from the mac - got it in the end though!