I sync from a Windows 10 PC, an Android Phone and a NAS. All good except on my Android Phone I regularly get the message "Can't Download File" (99%). When I check the phoneit shows Local xx and Total xx and the total is always more than the local, sometimes only one different and sometimes maybe 10 different, meaning there are some file that have not synced to my phone. When I look deeply, the "missing" files on the phone are actually there. What is going on?