Hi may can someone to help here. Today i restart my phone don know why will stuck on SAMSUNG screen like the picture. I see a lot tutorial say have to factory reset. Is that anyway I can make backup now?
You need to install stock Firmware into your mobile using Odin. You can find the Odin and Firmware for your Galaxy S5 from https://www.sammobile.com/firmwares/. I don't think you can backup your mobile at this stage.