I have found very interresting issue with my SanDisk iXpand Flash Drive 64GB model.
I am using iPad PRO 9,7" with iOS 10.x and iPad PRO 10,5" with iOS 11.2. On both is SanDisk app v4.5.
When I want to copy any file from iPad do the flash drive with battery level below approx. 70% (I am working on search of exact level), the copy progress bar hangs at very beginning and after a second, app pops up an error message “FAILED to copy…”.
The file then shows up on the flash drive, but with zero kB size.
Can you please help me with this?