We have an issue with 1 of our folders which is being replicated using dfs. It's working fine between server A and server B but not server C. I've just checked the backlog and it has over 71k files which are back logged. I went through the event log earlier today and we had event id 4202 which relates to the staging quota being over 90% so I increased this from 4GB to 8GB and haven't seen this warning since however the number of files is rising for some reason.
I doubt this matters but server A and B are running server 2008 r2 and server C is running server 2012 r2