Tiny partition in NAS4free

[Slurhn]

Hey guys,
 
I'm setting up my first NAS server on an old HP computer. It is a single disk setup for local backups.
I set it up according to a guide.
When I log in into the file manager the apparent size of the partition is 52 MiB, which is much less of the advertised 1.6 TB of free hard drive space.
 
It seems that the FM points to /dev/xmd0 instead of the UFS partition, but that's just a guess.

Any ideas are welcome.
 
Thanks
 

Screenshots:
 
File Manager:

List of Space on all partitions:

Information | Partitions: