You can see, now a part of SD card belongs to Device Storage.
At I chose the first option 25% i.e 3.7 GB is available as internal storage.
To make the adoptable storage as default storage we’ve to do a few more steps.
Click on the newly created “SD Card” option under Device Storage
Hit the 3 dot menu icon, and select “Migrate data”.
In this step, the data from internal memory is migrated to the adoptable storage.
After this migration, adoptable storage will be the default storage space for downloaded files and app data.
You can see the data from internal memory has moved to adoptable storage.
If at any point you wish to again make the internal memory as your default storage and use this SD card on another device, you can do that easily as per the steps below –
Click on “Internal Storage”
Hit the “3 dots” menu icon on top right corner and select Migrate Data.
By doing this we’ve moving back the data from adoptable storage to phone’s internal memory.
You can see the adoptable storage partition is now empty can be formatted.
Click on it as shown above.
Hit on the 3 dot menu icon and select “Use as portable storage”
Click on “Format” to remove the adoptable storage partition.
After this Format, the whole 14.8GB storage space will be available on the sd card.
If facing any issues, feel free to contact via the comment section below.