Qubes 4.1 - Connect a external SD card or HDD in the storage pool?

Is it possible to connect a bigger sd card and have it as mounted storage all the time and use it in the pool for qubes 4.1? So i can make bigger qubes,

If anyone knows how to make it and if its not to hard i would be happy!

And if u know what kind of external drives i can use would be great.

this is possible see here for some info regarding this: Secondary storage | Qubes OS