Hey! I had the same issue. Use a larger SD card. I used a 128GB one, it worked fine.
Hehe. Thanks @A1CY . I have already ordered.
Thanks @A1CY @Sohail it worked like a charm. But i cant see the realsense in the list of usb or move the robot with ./ example_walk. I have seen lot of people not being able to run the example walk.