Sony has released new firmware for the PDW-U1 that enables full data write back. The previous firmware version allowed writing MXF files into the Clips folder, but the new version adds the ability to write any data type to the UserData folder. This means that the ProDiscs can be used for data archive of any material, up to 46.4 GB on a Dual Layer disc. The PDW-U1 has finally become a full fledged data archive machine. The latest firmware also adds support for mixed format recording discs. Download the firmware from Sony’s support site here - PDW-U1 Firmware version 2.2.1 for Windows & Mac.