Crystal is a Data Source reporting tool and not a database archiving tool.
The report is not for archiving data.
What happens if you save it locally? Not that it make any difference, just curious if it is network related.
If you're asking if it saves/exports into a Crystal Report file (*.RPT) fast and fine, then the answer is yes.
As I stated, the issue is not network related, I've checked.
What are you using the export from CR for?
Our client is bank who needs these daily reports in Excel format. I'm not sure what they is for, though.