Someone upvoted this recently so as an update...
Now with iOS 14 you can use the file system on the tablet. We can copy to and from external USB also which is what we wanted.
Android has actually got harder now with v11. Most file programs now hide storage. So you need a 3rd part app to see them. Or have to plug into a computer. So they basically flipped.
Also iOS has been consistently way faster. Forms load in half to 1/4 of the time. But that speed has come with memory issues on larger forms.
I like the price point of the Samsung, and Android is a better OS, but at this point I had to start recommending Apple. They are just so much faster. Though the S7 has now gotten close to the Pro.
Having to get a cell card in the Apple world is about the biggest pain left now.
Hope that helps