Thanks for the reply futeko! Ok that's what I see, two partitions in setting/storage: 1,94GB and 3,77GB, sorry I forgot to mention the other one.
I had read in other forum that the Q10 takes about the half of storage for the android kernel an apps, like you say. But to compare I asked another Q10 user and told me he saw two 3,8GB partition in Kodi system info/storage, wierd! no?