I cannot find the setting for my Import refresh anywhere, please help

[MS54321]

Hi, I have a cloud SQL server with a PBI Gateway configured. I'm using Power BI free license.

On the SQL server I have a pbix that's pulling in various tables via the gateway as a datasource.

I believe this was originally set up as Direct Query, then it was changed to Import - and, from what I can gather, at the point it was changed to Import it prompted for the Refresh Frequency which got set to 15 minutes.

When I create reports against the datasource the data does indeed refresh every 15 minutes, but I want to change it to 30 minutes.

I can't find this setting anywhere, can someone advise?

When I go into the pbix on the SQL server, go into Model, hover over the tables it tells me it's definitely "Import" but I don't see any settings saying 15 minutes.

When I go into app.powerbi.com I can call up the dataset and when I click Refresh History I can see it's updating every 15 minutes, but when I click "Scheduled Refresh" under the dataset it's showing as being "On" and the Refresh Frequency dropdown is blank and the only options in the dropdown are Weekly and Daily.

So where exactly is this 15 minute refresh setting and how do I change it?

Many thanks!

[piotr_gor]

In Direct Query you can adjust refresh frequency at "every x minutes". You can check datatable storage type in Model and under "Advance" it specifies "Storage mode". 

On the other hand in import mode you need to specify at what time you want refresh to happen. To do so you need to simply click on "Add another time" and select refresh's time. 

[MS54321]

Thanks, when I go into Model > Advanced > Storage Mode says "Import"

When I go to app.powerbi.com, go into my Datasource settings, click Scheduled Refresh - it is set to "On", there's nothing selected in the "Refresh Frequency". 
But my data is definitely refreshing every 15 minutes (as can be seen in the Refresh History)
So it would seem my dataset is definitely Import? And it refreshes every 15 mins, and I can't see where that 15 min setting is or how to change it

[piotr_gor]

No, your dataset currently is in Direct Query mode. 

Have a look at: 

https://learn.microsoft.com/en-us/power-bi/connect-data/refresh-data#live-connections-and-directquer... 

[MS54321]

Thanks, I read through that. Can you explain why you say my dataset is in Direct Query mode? When I hover over the tables in the pbix Model page they all say "Import"