Is there a way to tell how much data is written to a DR6300 in a 24 hour period?
You could look at individual container stats (Active Bytes), and set the zoom to 1 day.
You can also look under Dashboard -> Usage, and set the filter to 24 hours. That way you will see that amount of data written in that period of time
For more detailed info, click on the menu with 3 dots in upper right, and choose Detailed Graphs.