On Monday, September 5, 2016 at 4:26:22 PM UTC-4, Andy Blackburn wrote:

The question is: Can you use HooToo to load a file from a logger with
a USB port (that part seems obviously okay) and then plug HooToo into
your iOS device, select that file as an iOS mail attachment (or maybe
it's a HooToo iPlugmate mail app)...

Yes, as I said in the initial post, it works like a charm.
The HooToo's app will copy *any* file (regardless of type) between
external storage and any app-specific internal storage area where
you've granted permission. But you don't need to copy to email it;
the app will allow you to select and email a file from the external
storage.

I could just buy a HooToo stick and find out I suppose.
I just don't want to waste the time if it's fruitless.

Already tested, works great.

See ya, Dave