# Reflash firmware of Rebel Data Logger.
After launching the Dialog Software, the user must connect the Rebel Data logger to the PC using a USB cable. To format the SD card in the Rebel data logger, click the 'Reflash' tab in the navigation bar.
Now click on the 'Browse firmware' tab.
Now, locate the latest firmware on the PC and select 'Open'.
Once done, click on the 'Reprogram' tab.
Select 'Yes' to confirm.
Wait until the logger is reprogrammed.
The logger is successfully re-flashed once the above screen disappears.
[Click ](/support_guides/product-tutorial-videos/dialog/dialog-tutorial-videos/set-date-and-time-format-sd-card-and-re-flash-firmware-of-rebel-data-logger.md)to watch the tutorial video.
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