SD card stops recording after 4 minutes

mkarn3yrumkarn3yru portugal
I am using cyton (8 channels) to record biological data for sleep staging (EEG, ECG,EMG).
I connect everything, start the system on the computer, check if everything works fine and go to sleep. I am selecting the 12 hour record option. I leave the pc on until it automatically pauses
In the next morning, I wake up, turn off the cyton board.

I have tested two nights and the files I get from the SD always stop recording after 250 seconds.

What may be happening?


I am using GUI v4.1.2 from May 2019 in a Macbook with macOS Mojave v 10.14.3.
My SD is a sandisk ultra, class 10, UHS speed 1

regards

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