Can I limit the date range to a time range within the day?  

Oops - I now have more than 200MB of data a day with 20-25 files.  It is blowing up.  The data per day will increase over the next week.  

Can this file size limit be increased, to day 500MB?

Can I limit the date range to a time range within the day?  I tried to do this but the results weren't right.

Unfortunately, we cannot increase the file size limit to 500MB. It is also not possible to limit the date range to a certain time range within a day. However, please note that the limit is at 250MB. I checked the submissions in the current day range and I was still able to download them. If you expect to receive 250MB of data with 20 to 25 files, you might need to download the files individually.

Do let us know if you need further assistance.
Regards.