How can i open big files of about 6MB, in my case is an excel file

Question

I've got some apps like Quickoffice and MegaApp but they are not able to open the file. Is an xlsx file of about 6MB size.

Answer 1

Thanks Daniel for pointing that out.  Though you answer is helpful but I am not sure if that is what I would want to do.
The link you provide for csv says "For each report there's an _report.xdo file that contains the XML structure of the report... "   It suggests I modify the .xdo file for each report.  I currently have 16 reports.
Does it mean I modify the .xdo file for all 16  and what happens if someone creates a 17th report ?
Also, what if I run the same report using different input parameters will that change the xml structure for the report  and therefore will need me to modify the .xdo again ? (I think it should not change the xml structure so the answer should be "NO" to that, unless I change the structure of the report).
Finally, the link you provide says after doing what it suggest  "Now log back into BI publisher and select the report. You should now be able to see that CSV is now an option."
CSV should be an option where ? on what screen/page ?  Maybe PDF is already an option for me that I cant see because I do not know where that option is.
I was hoping there would be something I could do on the xdo_metadata sheet (in the data constraints section or elsewhere) OR in BI Publisher itself as some property of the report.
I will try out what you suggest any ways.
M. Jamal