Ravens

I'll provide another solution if people are still wondering. Long story short, you may not be accessing the correct file path. If you're new to unraid, you may have glossed over some useful info right under your nose. For the sake of following the same steps, get the binhex version of syncthing, its the one I have. Go to Docker tab and click on it to edit the options. The first path he has hidden for appdata (which you can change), but focus on Host Path 2. Notice how underneath the path (which you can leave as /mnt/user) it says "Container Path: /media"? This is key, this is the (if you want to call it) root for your shares you'll put in syncthing. So check it out. Get out of those, options you don't really need to change them unless you want to. Go to your shares in unraid and add a share and name it what you want. I exported mine in SMB settings, that's a personal choice for me, I don't believe that's necessary, but I should mention it since I did that personally. Now open up the syncthing GUI by going back to Docker tab, clicking on the docker icon for syncthing and selecting "WebUI". Now in syncthing when you add a folder, use /media as the base of the file path to whatever folder share you made. That's the proper path. For example, "/media/sync" if I made one called sync. Something like "/mnt/users/whatever" will give errors often because it's not the container path in this case. Hope this helps someone. Very simple but can be a pain if you're not looking carefully.