How about a proprietary binary format that would reload the data if it was synced back to Drive/Docs at a future time? As the format evolves, an online tool cou

How about a proprietary binary format that would reload the data if it was synced back to Drive/Docs at a future time? As the format evolves, an online tool could at least extract csv/text versions of older data from the original files. Edit: HDF5 is great for storing OT data too, even if the operations and handling are proprietary.