so when I am on a PC I can easily back up my work simply by dragging and dropping it from the data drive to my external drive. This is while working on a PC. But when I am on a MAC I cant drag and drop the same way, it just shows a 'censored' symbol as if to say I cant drop the item there. Then when I tried saving something right to the external drive it said "cannot save while this drive is trying to open whatever the file name was" I had never heard of the file before it was trying to open, but i assume it has something to do with all the extra read me's and stuff that cant came with the external drive. I was told if I deleted all the extra stuff off the passport it would help, but It won't let me drag and drop those extra folders into the trash either. Not sure if I make sense or not, but this is important. It won't let me back up any of the work I do at home on my mac, so everything is saved to my drive only. My external is a Western Digital My Passport Ultra. How do I customize these passport ultras so they work with mac too? I heard I need to do something along those lines.