FLIR Cameras only support SD Card and not the MMC (MultiMediaCard). 

The SD Cards are recognized by the SD Logo and the notches on the sides 

From the www.SDcard.com 

What is the difference between the SD Memory Card and the MultiMediaCard? How are they related to each other?  
SD Memory Card and MultiMediaCard share the similar physical dimensions, which allows upward compatibility such that MultiMediaCard can be inserted into SD Memory Card slot. Further, SD Memory Card has various advantages over the MultiMediaCard, such as content protection, planned capacity growth, high-speed data transfer, and a write protect switch. The SD memory Card distinguishes itself further as a true network platform and has defined a variety of application data formats which ensures compatibility between devices which adhere to these SD Application Standards. Application standards have been defined for many types of audio, video and document files among others types.