This message was posted on behalf of Intel Corporation
The Edison standards specification compliance is SD Specifications Physical Layer Specification—v3.01.
According to it:
It supports five speed classes: 0, 2, 4, 6 and 10
Capacity Memory: SDSC,SDHC and SDXC
You can see more information here: https://www.sdcard.org/downloads/pls/pdf/part1_301.pdf