turn off the power during the upgrade process, as this can brick the device. Standard USB Update Procedure
When looking for the correct firmware, ensure it matches your specific hardware version: Blue Version : Labeled as V8Nova_Blue_release_xxxxxxxx.zip gtmedia v8 nova blue firmware
Bugs Fixes: Resolves known issues with EPG (Electronic Program Guide) or channel scanning. turn off the power during the upgrade process,
USB/SD update