MIC-5345 has capability to mount an on-board 8G flash (storage) by default. This pre-installed storage may confuse the boot partitions and the user cannot directly boot into what they expected to.
Without caring this on-board flash, customer may ask to disable it by in BIOS.
For audiences want to disable this on-board 8G flash by default.
1-This methodology for MIC-5345 series only
Please find attached PDF (FAQ_How_to_Disable_mic-5345_on-board_8G_Flash.pdf) for two methodologies to turn this on-board 8G OFF