Does anyone know the maximum sd card size you can use on the X710bt? I'm using an 8gb now but it filled up fast.

Kinda sucks but looks like your maxed out at 8gb...

manual pg. 213...

SD

Compatible physical format ..................................................... Version 2.00

Max memory capacity ........... 8 GB

http://www.pioneerelectronics.com/StaticFiles/Manuals/Navigation/AVIC-X710BT_OperationManual0512.pdf