Thanks @johnowhitaker for sharing your work!
@jgilhutton - also to help improve access to these large datasets, you can check out our experimental STAC browser, which enables you to visually preview each image scene and corresponding building labels and directly download the individual assets you want (via right-click & “save link as” on each asset link).
If you just want all the data that’s available, it’s more straightforward to download the entire tier1 and tier2 archive files or a preprocessed set like John’s but you may find value in being selective about what data to use and experimenting with different methods to preprocess the raw data into training chips, especially with the lower quality but very abundant tier2 training data.
More info about the STAC browser in this thread: Browse challenge data online with STAC Browser
Good luck!