iXpand hangs when slo-mo videos are encountered

I have been struggling to get my iXpand 32GB USB to sync with my iPhone 6. I have noticed that iXpand sync hangs every time it tries to sync a video that was recorded in slo-mo. The only way around this is to pause the sync, delete the video from both the iXpand camera roll folder as well as the iPhone which is obviously of no use. This seems to be a common problem. I will be returning the drive tomorrow for a refund.

firmware: 4.4.9, iPhone 6 64GB IOS 9.3.5.

according to sandisk support there is currently a bug in handing slo-mo videos. It should be fixed in an upcoming app update.