Files failed to sync

In the CC app on the Desktop app I go to the Assets then Files to file sync. I always keep this paused and only sync when I need to because when I do it always says that some files have failed to sync. Never has this been different throughout the many updates. I would like to know how to find out WHICH FILES have not synced or are having a problem. On a Mac it automatically puts a folder in a finder window for you. I have taken out files from this folder but they do not reflect online. What am I doing wrong?  I must be missing something. I have also tried to delete files from the online assets page where my files live but I do not see an option there. I can not find a delete files button so I am guessing that is done locally. I have tried to delete files from the CC folder locally and it doesn't reflect after I sync. Help please!  ( note: I do have files that sync from mobile apps and files that I drop in the folder. It seems to take files when it wants to as well like Motion 5 files but not FCPX. )