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STM32F407VET6 recognized as Mass Storage Device

YSukh.1
Associate

Hello, guys. Bought and STM32 board, tried to upload .hex file on it from ST-Link Utility, but when tried to connect board, received "No ST-LINK detected!". Checked in Device Manager - board appear as Mass Storage device(No ST-Link Debug, just storage device in USB Controllers). Tried to change driver to libusb-win32 - no result. In explorer there is two volumes appear when connecting the board, first one is 2mb and empty, second one in "not accessible" when trying to look inside. I'm new to stm32 and maybe missed some details, but have no clue what to do with that, found only one solution with driver change via Zadig, but it didn't help. Would be really grateful for any suggestions.

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