Do not update the firmware directly to GXX-M0/GXX-M1 or later version when a version older than GXX-K8 is installed! 

When updating firmware step upgrading is required! When starting on firmware GXX-K8 and older, GXX-K8 must be installed first. If not, an internal error will occur.
Once GXX-K8 is installed, update to the desired newer firmware.


GXX-K8 firmware is avaliable via "k8-<model>.tar" (example: k8-c654.tar). 

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Make sure SSD firmware is updated! There is an issue that can cause the SSD to fail early if it is not! 
Use the SSD update tool to check.