Sharepoint Datasource slow refresh

[Caro12B]

Hello,

I have a lot of my dashboards connected to Excel files in Sharepoint, since a week everything is slow : data update & preview in power query. Everything was really quick before and no change were made in power query. 

It takes an hour to get refresh completed. Is there a global issue on Power BI or Sharepoint side ? 

Thank you,

Regards

[ppm1]

Note that you can leverage incremental refresh with Excel files on SharePoint, if applicable.

https://www.youtube.com/watch?v=IVMdg16yBKE

Pat