USB HUB USB-C to 4x USB 3.1 External hard-drive compatible

I need a USB-C HUB compatible with multiple external hard-drives. There is not enough infos on the product pages or even on the manufacturer's website.

My questions are the following :

- Normally, USB-C should be able to gives enough power for 4 USB devices ?
- Do I obligatory need a powered HUB (more expensive) ?

Does someone have the same needs and/or experience ?
The problem is I will use this HUB on two PCs and only one of them has a USB-C power supply. So it would be more convenient that the USB hub is directly powered by the PC itself.

Thanks in advance