No Connection to Kernel Frequently

Currently using Ultra96v2 with PYNQ 2.5. The USB ethernet connection is really slow, and besides that, I often lose connection to Python kernel while notebook is open. I usually only keep 1 notebook running at a time. What might be the issue? Anybody experience anything similar? Any help will be greatly appreciated.

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If everything turns out to be very slow for you, it might be the SD card issue. I used to see that, but after I replaced a new SD card, it came back to the normal speed.

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Thanks for the response. I got a new card and it definitely helped.

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