Can't rename a folder

Hi, I am not very good with LINUX, but I am learning... However, I have a problem with renaming a Folder.
On my /dev/sdb/ I craeted a Folder called "Movies Foreign". To that folder I copied many subfolders containig movies form my windows PC. Then I decided, that I would like to organise these subfolders differently, created another Folder on /dev/sdd/ which I called "MoviesAlreadySeen" and tried to move some of them. Of course, moving them from my windows explorer is possible, but it's a very slow process since moving subfolders by means of windows explorer they have to go over the network. So I invetigated how to move them directly on the NAS and learnt about the Rsinc.
I installed the plugin and tried to use it, but it does not work, giving me the following message: rsync: link_stat "/media/31bb010e-856a-4b46-ae53-a96cd8cadcbc/Movies" failed: No such file or directory (2) -467e-ba34-a120b6fa6914/MoviesAlreadySeen/> ...
After some investigation I believe that the problem is due to the the space in the name of the Folder "Movies Foreign". I tested this creating another folders, named without spaces and the tried to use the Rsinc - and the moving worked OK...
Could you please someone help me with this? I would like to rename that "Movies Foreign" folder to some other correct name. Also I don't want to loose my movies subfolders during that process...

I don't know how to log into ssh...

I installed the winscp but so far was unable to make it working. I can see the folder I would like to rename but when I try it to do it I would get the following message:
Error renaming file 'MoviesForeign' to 'MoviesFor'.
Reaname /MoviesFor: Is a directory
I tried other folders I made just to try to rename - it's the same story...

I don't understand what you mean with "if omv has a shared folder as refernece..."

But there is no folder above that, it is /dev/sdb1/MoviesForeign.
In the Shared Folders it is like this:
Name___________Volume_________Path__________Comment________Referenced
MoviesForeign___/dev/sdb1_______Movies Foreign_________________Yes

I have SSH enabled. I did not know that the login is "user"

It Works!!!
I created the share for sdb1 as you suggested, and than I was able to rename the Movies Foreign folder to Movies_Foreign. Then the Rsync started to work as well and I could use it for moving the Subfolders...
So, the problem was the space in the folder name I created.
I'm not sure how it is with the ssh, I have no idea how it works through the OMV. When I click it, there is this General settings (Enable, Port, Permit root login etc.)... and I don't know what else should happen.
I access the OMV as the admin - when I click the ssh there in Services, it is the admin who is clicking it not the user, so I am wondering, did you mean that I need to put admin in the ssh group to access ssh?
Is there any guide concerning using the ssh from OMV?
Thank you subzero79 for you help!