From the User Manual
2.3
Setting Up the System
2.3.1
Insert MicroSD Card
Insert the supplied MicroSD card into the board’s MicroSD card socket J20.
Note: MicroSD Card is included if ready at the date your kit was shipped.
For the latest version of the BSP, please visit www.element14.com/iMX6
There currently does not appear to be a way to download the content of the MicroSD card from any of the links on the www.element14.com/iMX6 page mentioned in the manual.