My repository size seems far larger than on disk; spacesniffer shows the bulk of the size is within the .git folder. I possibly ran BFG in the past but without being able to run garbage collection. I have conducted the steps again for this repository for the likely file and folder size offenders; "No refs to update - no dirty commits found??"
Could I please ask an Atlassian colleague to run the garbage collection step (gc —prune=now —aggressive) on my repo poweredbyeverrati.git?