If data transfer is slow then the problem is in USB cable so first try to change USB cable get faster data transfer cable.If you have old software in your phone then update your system or if you're using low end pc then upgrade its hardwareAccept my ...
It's not software problem because screenshot you shared is in proper colour , so it's a hardware problem.I will recommend you to visit only nearby samsung service centre to replace or repair display. Don't visit any other shop or service centre.Accep...