Hi ! Please use my_dataset.push_to_hub() to save your dataset on the Hub. Then to reload you can use load_dataset(). You can see the documentation here 3
Datasets saved with save_to_disk and uploaded manually to the Hub are not supported (yet). This is because saving locally uses the Arrow format: while this format allows a dataset to be immediately reloaded, it’s not the preferred format to store in the cloud since it’s uncompressed (it requires more bandwidth)