Fatx is a related term of vfat.

In computing|lang=en terms the difference between fatx and vfat

is that fatx is (computing) (xbox) file allocation table: version of fat used on xbox consoles and compatible storage peripherals while vfat is (computing) a virtual file allocation table; a version of file allocation table that supports an extended set of features such as support for long filenames that the original fat file system did not have.

As a noun fatx

is (computing) (xbox) file allocation table: version of fat used on xbox consoles and compatible storage peripherals.