How jetson nano , connect 4 usb camera?

hi, i use jetson nano ,i can conect 2 usb camera is ok ,but when i start connect 3 usb camera,it error ?
My Purpose is use 4 usb camera in 1 jetson nano ,Can do it?
opencv , python 3.6

Thank you very much

Hi,
You may hit bandwidth constraint if you use USB2 cameras. Please refer to
connected more than two usb cameras problem on deepstream-app (Jetson Nano Dev Kit) - #12 by DaneLLL
Suggest try USB3 cameras and have external power supply.

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Thanks for the response.
i use ELP cameara ,and i want to connect 4 camera in onetime, but when i connect 3 or 4 camera it error “jetson nano vidioc_streamon: no space left on device” ,how to Solve the problem or explain about problem.
Thank you very much

Hi,
The case does not work on default devkit. Suggest you check other carrier board from our partners:
https://developer.nvidia.com/embedded/community/ecosystem?category=hardware_design_services_hardware_design_services

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Thank you very much