Hi Zack,
Perhaps you already know this, but any picture uploaded via the Picture Uploader element is taking up some of your Bubble storage space, regardless of whether or not you store a reference to that image in your database. Resetting the inputs to remove the thumbnail does not delete the image from your Bubble storage.
You can check Data -> File Manager to see all of the files currently in your Bubble storage along with their size. If what you see is not what you expect to see, it might indicate that your uploads are not being properly managed. This is rather important given that many folks upload large multi-megabyte images without thinking about it. Bubble’s Imgix service automatically optimizes them for display when a page is rendered, but the large original remains in Bubble storage until such a time as it’s explicitly deleted. The onus is entirely on the Bubble developer to manage uploaded files.
If you need more info, let me know, and I can elaborate.