Moto X uses F2FS. "The Moto X’s pseudo-stock Android 4.2.2 uses ext4 for all partitions with the exception of user data storage, which uses F2FS (Flash Friendl

Moto X uses F2FS. "The Moto X’s pseudo-stock Android 4.2.2 uses ext4 for all partitions with the exception of user data storage, which uses F2FS (Flash Friendly File System)" http://www.anandtech.com/show/7235/moto-x-review/9 http://www.anandtech.com/show/7235/moto-x-review/9