The file system structure that maintains security information on volume %1 (%2) has grown excessively large and fragmented. ...

The file system structure that maintains security information on volume %1 (%2) has grown excessively large and fragmented.  The structure has reached %3%% of its maximum fragmentation limit.  If the structure continues to grow and reaches this limit, it may not be possible to create new files on this volume.  It is strongly recommended that the volume be taken offline for preventative maintenance.