How do I mount an On-The-Go storage device?

I have a MotoX (1st gen) and would like to mount an On-The-Go micro SD. How do I do this?

https://www.google.com/search?q=On-The-Go+micro+SD&ie=utf-8&oe=utf-8

Plugable’s new USB “On The Go” MicroSD reader | Plugable

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