We need an additional parameter in Xrm.Navigation.openFile as when we use this function inside Field Service Mobile application then it automatically save inside TempState Folder of Application's App Data folder. If there is a path parameter developer can save the save inside the App data only but inside another directory where the file is not removed.

Also, Xrm.Device.pickFile should have the file path parameter where it can auto pick the file without user interaction.

I do understand that this requirement is little concerning the security but we need to add app settings where this file path with only work in the App data directory, not the external directory.