Look for a file typically named update.zip specifically categorized under the S6 or S6+ folder.
Look specifically for the category. Download the latest version available. The download will usually be a compressed file (such as a .zip or .rar archive) containing the firmware image (often a .bin or .rom file) and a readme instructional text file. How to Install the Firmware on Your Mecer Xtreme S6 Mecer Xtreme S6 Mini Pc Firmware Download
Adds support for newer USB devices, external drives, and upgraded RAM modules. Look for a file typically named update
Wait for a prompt to appear on the screen automatically asking to install the update. Mecer Xtreme S6 Mini Pc Firmware Download