Data Mountpoint if My secondary server is 100 % utilised and no space is there in secondary server Since one week , Data in Primary server is increasing but still my Replication is in sync and service is running in secondary server , How can this be possi

Data Mountpoint if My secondary server is 100 % utilised and no space is there in secondary server Since one week , Data in Primary server is increasing but still my Replication is in sync and service is running in secondary server , How can this be possible ?