It now works! My IT guy at work used a different flash drive. A PNY 32GB. Plugged it in and success. Either the Sandisk isn't compatible, or 64 GB is too large a file? It works in a regular computer. So...to all who helped, and there was quite a few, a major thank you! Just beware of a Sandisk 64GB! Now, I was so excited that it worked, I didn't try the iPhone, but as of now, I don't need it to work there anyway.