keras .h5 model

[fisakhan]

I need to use keras (.h5) model. Where can I download it? If not available, then how can I convert this model to .h5 format?
I already have the savedmodel format and tried to convert using the following command.
tf.keras.models.save_model(saved_model, 'retinaface_mbv2.h5')
But it saves retinaface_mbv2.h5 with only 800 Kbytes and is not working.