I m facing the same problem that seems to occur after iXpand Sync upgrade (November 30). It used to work without any issues (iXpand 32GB drive) as soon as it was attached on my ipad mini 2 retina running iOS 8.4.1 or any pc/laptop at work or home. I have noticed that the firmware upgrade was pointing specifically for iOS 9 compatibility that im not interested in upgrading my devices (ipad/iphone). Actually trying with a friend’s iphone running iOS 9.1 the application (iXpand Sync) is giving the same message (besides the firmware upgrade warning) that no drive has been detected. It still works fine with any laptop/pc but not anymore with ipad/iphone (in my case devices running iOS 8.4.1).