Converting selected multipart features to single parts in QGIS

How do I extract selected features in QGIS?

Once the features have been selected, right click on your dataset and select the “save as” option from the menu. From the interface select the desired file format. Under encoding click the “Save only selected features” box. Click “Browse”and designate the file name and location.
 

How do I move selected features to a new layer in QGIS?

Select some features, copy them to the clipboard, and then paste them into a new layer using Edit ‣ Paste Features as and choosing New vector layer or New memory layer. This applies to features selected and copied within QGIS and also to features from another source defined using well-known text (WKT).

How do I save selected features as new shapefile in QGIS?

When you have selected the geographic features that you want to export to a new GIS data file, right-click on the layer in the legend window and select “save as..” The window that pops up provides several options to choose. First, under format select the file format (shapefile, GeoJSON, KML, etc.)