New firmware often re-formats EXT3 drives. Always back up data externally before proceeding.
In 2007, D-Link released firmware version 1.11 for the DNS323, which was intended to fix several issues and improve the device's performance. However, many users reported difficulties in downloading and updating to this firmware version. The issues ranged from failed downloads to bricking of the device. The problems led to a significant number of complaints and queries on online forums and D-Link's support pages. dns323 firmware 111 download fix
The most reliable source for the final official version (v1.10). New firmware often re-formats EXT3 drives