It should be able to see and transfer all files in the camera roll or on iCloud however sometimes slo-mo videos or edited pictures can cause some unexpected behavior.
You can use the following link to submit the support request to sandisk support http://kb.sandisk.com/app/ask/
To get the debug log go to view files. Once on that screen you will need to pull down the the list of folders to reveal the search bar. In the search bar type sandisklogs and press search. This will open your default email client on the iOS device with a log attached. Send that log to yourself and attach it to the support request when you submit the support request to sandisk support. Also include a detailed description of the issue you are facing in the support request.
You can always contact sandisk support by phone and they will be happy to walk you through the process. 866-SANDISK
