I think that there is no I need, but others mighty say otherwise. Since you are coming from the OG Evo, I know that you have a microSD.
On the LTE, it has the internal memory (just like the OG), and it has the internal storage, which is the equivalent of the SD card on the OG. And THEN you have the external SD. Apps aren't saved to the ext SD card, and you have plenty internal storage for the apps. The data from the apps are automatically saved to the internal SD (like 1gb+ for real racing 3).
Phone: HTC EVO 4G LTE
Sense 5, S-Off
Tablet: ASUS Nexus 7.2
Rooted, Custom Rom & Kernel