We do not recommend using ASIO4all in your DAW for your Focusrite Interface.
The Focusrite Interfaces all come with a native device specific driver that includes both ASIO and WDM driver types.
ASIO4all is designed for units that do not have native ASIO Device Drivers, like your computer's built in audio.
(Example Realtek or Nvidia HD Audio, SoundBlaster cards)
This means that ASIO4all connects to an audio device's own WDM Driver or the Windows Generic USB Driver and allows that driver to appear as ASIO to your DAW.
Thus when using ASIO4all you are bypassing the manufacturer's own ASIO Device Driver written specifically for that hardware. Using the WDM Driver or Generic Microsoft driver for that audio device will have much slower latency and performance than a native ASIO Device Driver.
Please always select the correct device driver for your Focusrite Interface, which should read "Focusrite" or the unit's name such as "Scarlett" "Saffire" "Clarett" etc.
For more information on ASIO4all please see the ASIO4all FAQ page here. You can see in this article that ASIO4all makers do not recommend installing the manufacturer driver for your USB unit, same as we don't recommend installing their software. Thus please do not run ASIO4all with your Focusrite unit, as these are not meant to be compatible.