My family member has both a MacBook and an Asus. She's had nothing but bad luck with the Asus and wants to get an external hard drive to put all her pictures and files on so she can access them in her MacBook. She's unsure when it comes to them and has asked me but I have limited experience with Macs. The question is: Can she use it for both systems and be able to access the files or would she potentially risk losing them by switching between systems? I had found some FAQs for both Seagate and WD as far as the formatting and that you have to format it a certain way to access on both. Is this something easy to do and again, are you at risk losing the files? The files are mostly pictures of her young children so they are very important to her. If I have put my post in the wrong area, I apologize but I thank you for your help answering these questions!