if you open "Settings", scroll down to "Apps", tap the app you'd like to move, then under the specific app options tap "Storage" and under "Storage used" tap "change" , it gives you the option to move the app to an SD card if you have one installed.
There are exceptions. If the app is preloaded or somehow registered to your Google or Samsung account , they don't allow you to move most of those apps. It's hit and miss but you can move some and of course it's a pain to move every app individually.
You can also go into "Settings" and "Storage" and select your SD card and tap the hamburger menu, and select "Settings" and "Format as internal", then "Erase and Format". your SD card will then be read as internal storage
This does not work on the A7 10.4. It's starting to remind me why I have not purchased a Samsung product in several years. <edit>. I already put a lot of time and effort into getting this thing set up. Not sure if I can return it at this point, but I guess I'll try.
This isn't an option on a single app I've got. Seems the device just doesn't support moving apps to SD. Massive disappointment, no valid reason for it and it hugely limits the usability of the device.
There is no "Storage" option in "Settings" except for the "Storage" under "Device care." When you select the "SD card" option there's no hamburger menu. The "Advanced" option only allows you to "Format" but not to "Format as internal." Really sad. This new tab is going back to the store for one that's a true Android.