sorry, couple of things to add:
in mgmt system if I try to format I get error message: 'Action failed! Error input data'
I get the same message if I try to add a folder in the SMB server function.
In status it shows 'free size: 0MB free' and 'total size: 476940MB'.
Also forgot to add that I have tried an old 10GB HDD and it works ok.......
:( I can see the bin looming.... 500GB, £120, sob click here
hope this is in the right place...