I noticed copy/paste did not do the icon justice so I printed it in pdf and then capture the image below for you:
View attachment 40316
If you can make it to work follow the instructions above, then I supposed you can try doing it via cloud instead. Once the file is in the cloud, you should be able to move it back and forth, or even email it to the iphone and then when you download it you should be able to select the MultEQ folder as the destination right?
I no longer have an iphone to try as I gave it up a few years ago.