That ability to be able to mark as a single internal storage which adds to the internal memory and the microSD card that we have installed in our mobile, and which is called "Adoptable Storage", will not be available in Samsung with Android 9 Pie.
A striking function due to the fact that it adds the memories that we have so that only one is shown, but that also takes its criticisms due to the fact that these microSD cards are not always have sufficient read and write speed so they perform at their best.
Be that as it may, the "Adoptable Storage" feature not coming to Samsung update to Android 9 Pie; that supposedly in the Note 9 and S9 will arrive in the middle of January next year.
From the beta that those who have a Galaxy S9 and Note 9 can enjoy, you can even see a screen in which the "Adoptable Storage" option appears, although it will not really be in those Samsungs. Another problem with this technology, if we have it activated, we will lose the ability to remove the microSD and take the data to another device.
So it looks like Samsung not very much for the work of offering this technologyas you can get more problems than solutions. Anyway, who knows, in a future update the Korean company will finally decide to implement it so that you have all your memories available from one.
We will see if Samsung brings it to all your devices or it remains only in the entry or low-end ones where it may be interesting to show that you have more memory when you do not go beyond the base 32GB. A piece of news that adds to the many other news that we usually have about the Galaxy S10 and that it even has the speakers on the screen.