getting SKU size error while refreshing dataset

Hi dd96 

Accroading the error message, your data storage has exceeded the maximum storage capacity of the SKU, and the corresponding different SKUs in Premium have corresponding data storage limits.you can refer to the following link to know about the SKU storage.

https://learn.microsoft.com/en-us/power-bi/developer/embedded/embedded-capacity#sku-memory-and-computing-power

and the questions you have asked, you can refer to the following reference:

Is it possible to create one report from multiple reports ?

Maybe you can create a app, then add the multiple reports to the apps(the reports are in the same workspace), you can refer to the following link:

Publish an app in Power BI - Power BI | Microsoft Learn

Is it possible to create Power BI report from different datasets created in different workspace ? 

If you have the build permission of the dateset you can create a report based on the dataset from different workspace, you can refer to the following link:

Create reports based on datasets from different workspaces - Power BI | Microsoft Learn

Best Regards!

Yolo Zhu

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