If in your computer the instrument appears as “unknown device” and you are not able to enter, it could be necessary to repair and restore the USB memory.
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press the right button of the mouse and choose the option format at FAT32
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enter in the “Configuration Menu” and scroll the menu: at the end you will find the buttons for formatting the USB or/and the internal memory. Just press it and confirm.
Note that the Instrument’s settings and files are reported to the original manufacturing: It is important to have a backup of personal files!