My lounge HDR-FOX has a 2TB drive fitted. The 'My Video' folders of two other HDR-FOX units are mounted on this device as NFS shares. It is known that such shares affect the drive space calculations on the HDR-FOX. As far as I can tell, when a share is mounted the free drive space of the shared drive (and used space, by the way the chart changes) is added to the local drive. I replaced the 500MB disk on one of the remote units with a 2TB drive. After the upgrade, mounting this as an NFS share makes the disk of the host unit appear full and makes recordings fail in the process. I presume that it can't cope with total amount of free space being greater than 2TB. Mounting the unit with the 2TB drive as an SMB share gets around the problem.