Version 8.2.4 by the way. 
I copied the spreadsheet to C:\temp on the VisualCron server, edited the task's folder to be C:\temp. The filename is not a regex and it took 53 minutes.
Note: when I open the sheet manually using Excel 2010, a security warning appears stating data connections have been disabled.  If I click the button to "enable content" I get a dialog asking me if I want to make this a trusted document.  The files still export though eventually, and if I manually edit one down to 60 rows it converts in a flash.
Thanks for your quick attention by the way!
Gary
                      Edited by user
                       
2017-02-16T19:32:35Z
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Reason: Not specified