This is the exact Samsung connector inside the Samsung S8/S8 Plus box.
Genuine Samsung reversible USB Type-C male to USB female On-The-Go adapter
Connect USB-equipped devices to USB-C devices with comfort
Support for USB Type-A and USB Type-C, the data transfer between your compatible smartphone and USB-supported storage media is quite easy.
Use the adapter for charging or data transfer if your device doesn't support OTG function (NO RETAIL PACKAGING)