After running the same S7+ install since I got it a year and a half ago, I decided to wipe and reload.
I have set my tablet up to use the microSD card as internal storage, and it has given me a lot more flexibility. So, I tried to do the same with my phone, and didn’t have the same options.
Did some googling, and found an ADB command to force it in the background. I attempted it several times before returning to the Googles. It appears that Samsung “fixed” that command, and it no longer works in the newer releases.
Honestly, I like the hardware for the S7, but it’s the little software quirks like this that really turn me off to the device. I got this phone to replace my LG G4 after it succumbed to the bad circuit board issue that plagued that model. I’m up for renewal in September, so at this point, I’m not sure I’d go back to Samsung. Might just look at a “clean” Android phone.