What data is inside there: That would be all you metrics/properties historical data that has been written to disk
why is it splitted to directories: I would guess that is the way the database organised the data
What's in each directory: Dont know but if you wanted to know check the documentation on the database vrops useses
Can I manually delete this data: i would not as it is split across all nodes. what data is relevant and what is not is hard to work out
you could change the Additional Time series retention to 0 months so no roll up data for additional 36 months is kept. This saved me 40% storage space
you can also adjust the Time series data retention from the default 6 months to what ever you want.
you could cut down on the metric your policies collects
you could change the Action history default 30 days
you could change the Deleted objects from 168h
you could change the object history from 300 days
look at these before manually deleting the data. also check out the sizing guide and input the data form the vrops audit report to see if you have sized the storage correctly
