Hello Rakosman,
As Angel has pointed out, there are a few users who are saying that this issue is tied directly to the latest preview builds of Windows 10 and that report can be found at this link. I’m currently waiting to get my hands on a drive with Windows 10 Pro so I can try this myself. If you think this may be the same issue, it would be best if we kept all of the information in one place and referred to that post for further discussion. If not, please let me know and we can try to nail down a repro here.