OldPilot said, "Android no longer allows you to access an SD card."
That's not true. While external storage management on Android has varied across versions, there has never been a version of Android where you could simply say "it no longer allows access". Even the reference you provided doesn't say that.
Brian has worked hard to ensure that the ability to store iFly data on external storage works on all Android devices. It has consistently worked well on my Samsung S4 phone through several V4.x versions of Android (after I replaced a faulty SD card that drove Brian and I batty for a whlie).