I agree with @JayMontana36. MineOS is not designed to use root only. Root is only used to do Sys admin work, and tasks that border on tampering with the kernel and files that should live protected from change by any other than root.
MineOS uses the default “normal” user you add at install to run most of its proscesses. The default user for a MineOS ISO is “mc”, and all tutorials refer to “mc” being the MineOS user. (If you install another distro, then install the MineOS package on top the default user can be anything you decide, but not root). Since you have your server ownership as root, and MineOS runs most of it’s tasks as a local user, I think you see a rights problem. I think your server lacks the right to write to your disc in that directory since it is owned by root.