[Sorry for all the switching around. I merged you into the other thread, since that was the question you were asking – but then I separated you into your own thread (in an appropriate category), because I think your situation might have a solution.]
You currently have over 30 GB of media in your AnkiWeb account. Even multiple med-school decks shouldn’t get you to that, so it’s likely some of that is leftover and unneeded. Before we even talk about AnkiWeb-collection-size limits, the first thing you need to do is run Tools > Check Media – “delete unused media” – and sync that deletion to all of your devices. [Make sure you have all devices synced first, or the deleted media might be “helpfully” restored for you later.]
Then, in addition to the suggestions in the linked thread – you should follow these steps to identify where any size issues are in your collection and fix them – Constant Errors Uploading / Sync - #4 by Danika_Dakika . You’re close to the limit for syncing, but given the age of your collection, that doesn’t seem like it should be happening without a cause.