How many mass storage usb devices can handle the SOM, DART-MX8M of variscite? - usb

Hello I need some help about the quantity of usb mass storage that can support the SOM DART-MX8M of variscite.
I would like to ask to someone How many Mass Storage USB devices can handle the SOM, DART-MX8M of variscite?
I hope someone can help me.
thanks.

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