Issues in the data of ' Mean surface net short-wave radiation flux' and 'Surface net solar radiation'

I have downloaded the .nc files for multiple years. Almost every year the given values are within an absurd range (1e-15). The values are repeating as well. File sizes are also different for same spatiotemporal range. For ‘Mean surface net short-wave radiation flux’ , the file size is arround 140mb while for ’ Mean surface net short-wave radiation flux’, it is arround 49mb. Please look into the matter.