Here are the specifications for the SD card to use in your Conduit/Conduit3 device:

• MicroSD memory card – The capacity limit is up to 32 GB using an industrial-grade micro SD card.  The SD card should meet the following requirements according to the processor datasheet regarding the High Speed Multimedia Card Interface (HSMCI):

-Compatible with MultiMedia Card Specification Version 4.3
-Compatible with SD Memory Card Specification Version 2.0
-Uses the Secure Digital High Capacity (SDHC) format,  version 2.0 of the SD specification, which supports cards with capacities up to 32 GB
-Compatible with SDIO Specification Version 2.0
-Compatible with CE-ATA Specification 1.1
-NOTE: The quality and performance of SD cards varies by manufacturer. We recommend using industrial-grade micro SD cards from the following manufacturers based on customer applications (you may select your own if it meets the above requirements):