Help: Access/Read files from Drag and Drop

[shipettos]

Hello,

I am trying to read the files in the drag and drop box, but I have trouble locating them. I want to access them in order to save them in a custom location in the hosted server.

How can I access them? Which object should I use?

I have created a simliar file to removeUserAddedData.ts, which uses these :

export default function (terria: Terria, target: BaseModel) {
  //  terria.catalog.userAddedDataGroup.remove(CommonStrata.user, target); //prev example:
  // TODO: locate the file somewhere and save it in a custom location
}

Any help will be appreciated. Thank you in advance
Andreas