Hey @VictorMeldew ,
apps need to run on the phone's internal memory to perform correctly so this is no longer an option on our phones, I'm afraid. Are you trying to free some storage on it? If so you can find how to do this here: https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-up-memory-space-on-my-device/
The SD card has always been primarily intended for the storage of your own data files, like media files (photos, videos, music) and documents. Using the SD card to install actual apps has historically been fraught with glitches and risk of data loss since SD cards are notoriously unreliable and relatively easily corrupted (compared with on-board memory) which is why this is no longer available.