Unfortunately that's no longer possible unless you hack your device and modify the route in the config files. You might be able to move apps to SD card if your device allows that (but it's still up to each dev to decide how much of an app, if anything at all, can be moved...some allow only gamesaves, others only external downloads, etc.). BUT apps' main files and installations will ALWAYS happen to internal memory (unless, again, you root/hack to modify that... or if your device supports adoptable storage which but that still doesn't let you specify SD card directly, the device just sees the SD card as an extension of the memory available). So even if you do move app files to SD card, if there's an update, the app will be moved back to internal memory as it can only be installed there.