Joseph wants to an SD card into his phone and make it part of "adoptable storage," making the phone think that the phone is larger than it is. Rich says that Samsung doesn't allow that on their phones anymore because it's difficult to do, and if the card gets corrupted or loosened, it could prevent your phone from working properly. So Rich says that even though Android supports it, Samsung may have locked that feature out. Is there a workaround? Rich says you may be able to do it by rooting the phone, but it's not all that easy. Rich recommends FilesGo, which is Google's way of clearing out space on your mobile phone to make more space.
From ScooterX in the chatroom - https://www.makeuseof.com/tag/move-android-apps-sd-card