# How to access sd card in application

**URL:** <https://mangoh.discourse.group/t/how-to-access-sd-card-in-application/458>\
**Category:** mangOH Green\
**Created:** [April 4, 2017, 10:38am UTC](https://mangoh.discourse.group/t/how-to-access-sd-card-in-application/458 "2017-04-04T10:38:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rups](https://avatars.discourse-cdn.com/v4/letter/r/5e9695/32.png) [@rups](https://mangoh.discourse.group/u/rups)\
**Post date:** [April 4, 2017, 10:38am UTC](https://mangoh.discourse.group/t/how-to-access-sd-card-in-application/458/1 "2017-04-04T10:38:25Z")

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Hello everyone,

I am using mangOH Green board with ubuntu OS Developer studio 5  
I want to detect my inserted SD Card and access it in my application.

mux 9 command is giving error as ‘not found’ in my terminal window.

How can I achieve this ?  
and at /dev , which file refers to SD card slot ?

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<div class="post-metadata">

**Author:** ![rups](https://avatars.discourse-cdn.com/v4/letter/r/5e9695/32.png) [@rups](https://mangoh.discourse.group/u/rups)\
**Post date:** [April 5, 2017, 8:01am UTC](https://mangoh.discourse.group/t/how-to-access-sd-card-in-application/458/2 "2017-04-05T08:01:14Z")

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Hi,  
As per search on forum, I came to know that GPIOExpander and MuxControl service needed to be running on my mangOH green borad for SD card detection  
I have downloaded it from github  
but I am not able to run it on my board.  
How to run it?, can any one tel me?