Bests & Worsts Reviews from Amazon

This review is for the SanDisk iXpand 128 G Flash Drive. My iPhone is a 6 Plus running iOS 9.3.2. This flash drive I s a great idea, but it's not working for me. So far, I haven't accomplished anything useful with this drive. I have over 16,000 photos and videos on my phone, and this drive didn't even count all of them. The drive doesn't seem to allow me to select all of my photos to back up. It backed up a few (like 166, and then 8) and then stopped. It took forever (hours) to just do those few. Now, when it says "backing up" it will stop at 8 and freeze dead in it's tracks. I've closed the program and opened it several times. It keeps asking for permission to communicate with my phone. After I allow it, it still doesn't do anything. If I go out of it to do something else with my phone, it appears that it cannot run in the background. I have to be looking at it for it to even copy 8 photos. It will say it's backing up, but the count will stay at 8. I have to congratulate those who got this drive to work. Maybe I just have a defective drive. I would be happy to revise my review if this drive starts working.