A:Answer Hi, Yes you can use the drive on multiple devices, but not at the same time. You can plug it into one computer, safely eject it, and then connect it to another. If both devices are Macs, it will work directly. If you want to use it on both Mac and Windows, you may need to reformat it to exFAT, since the default Mac format may not be compatible with windows. If you have any further questions or need technical assistance , kindly open a support ticket at https://support-en.wd.com/app/askweb