We are slowly accumulating both image and database data and our current disk will likely be full within the next several days. Fortunately I can increase the size of the disk by another 30GB without incurring any additional cost, which should be enough to at least another month of data. Unfortunately Linode doesn't let me increase the size while the server is online so there will be a brief downtime while I shut down the server and reallocate the disk.

Edit: Completed with just over 1.5 minutes of downtime.