I have a 1 TB WD elements portable external hard drive WXD1A8230451. I accidentally unplugged it while copying data on to it on a different computer which uses windows 10 and it now doesn't work. I usually use a windows 7 computer and I've tried it on both computers it just wont show up so I can use it. It does not appear in disk management. It does however appear in device management under the disk drives tab and it appears in the safely remove / eject tab. In the disk drives tab when I select properties it states the device is working fine but does not display its capacity. I haven't attempted anything to fix the issue in fear of damaging or loosing data I will never get back that is so important to me. What can I do that will not result in lost data?