If no one has store the data then why my disk is utilized
and how this current month earnings is calculated
What do you mean? I see the used space on your graph.
Current Month Earnings - it’s an estimation: if the usage would be like this, then in the current month you would earn this amount.
Total Earned - it’s a total sum for all previous months. You need to have receipts from the satellites.
Total Held Amount - it’s a total sum of held amount for previous periods. You need to have receipts from the satellites.
If it’s a first month for your node, it doesn’t have past receipts yet, so the last two values will be zero, until it will have them.
The satellites sends receipts when the payout is completed. This usually happen in the first two weeks of every month. You may check your dashboard after 15th day of the current month to see receipts for a previous on the Payout information page of your dashboard.
See also