If you want to use it as internal memory you need to format micro sd and encrypt it.
Galaxy s8 adoptable storage.
However you can force any app to write to sd card by enabling this feature in developer options.
With adoptable storage android encrypts the external sd card being used as internal storage thus it gets tied to a specific android device.
Connect your galaxy s8to your computer or laptop.
Mainly adoptable storage is the technology applied to devices with low internal memory capacity due to technology constraints or price issues.
The key used to encrypt the data on the sd card is.
Press enter then find the id of the microsd card in your galaxy s8.
You can use micro sd card in galaxy s8 and s8 as portable storage to expand the storage if you want to keep a lot of offline media files with you in the phone.
Since android marshmallow adoptable storage i e using micro sd card as internal storage has been introduced.
Make a note of the microsd card disk id.
To do this type sm list disks in the cmd window.
But samsung blocked this feature and therefore you can only use micro sd card in galaxy s8 and s8 as portable storage not internal storage.
Open the cmd command terminal and type adb shell.
How to enable adoptable storage on galaxy s8.
Samsung and google doesn t support adoptable storage because it s way slower than built in flash storage especially on s8 that features ufs 2 1 and causes unstable slow system performance.