Because of my work, I'm planning to buy a 4K monitor, and since I hate cables I would like to connect it to my laptop (ASUS Zenbook UX501VW) with the smallest number of cables possible. As far as I know, the USB-C port in my laptop supports DisplayPort and Thunderbolt protocol, and also capable of power delivery.
One of the candidate monitors is the LG 27UK850-W. The specs say that its USB-C port is also DisplayPort, data and power transfer capable, at the same time, but as far as I know (I'm pretty confused with all these new USB protocols), different protocols need different cables. I mean I've read that a DP capable cable might not work as a PD or a data transfer cable.
So tl;dr: Can I use only one cable to connect my Zenbook to an external monitor, an external HDD (through the monitor's regular USB ports), and charge it in the same time if I pick the right monitor?