USB-C problems powering older external disks

Recently I bought a very nice and impressive HP Spectre x360 Convertible. 8th gen core i7-8550U (1.8GHz). 512GB SSD with 8GB DDR3 RAM. It has 1 'standard' USB3 port and 2 USB-C Thunderbolt ports.

My problem is that I can't run my older ext. USB disks. I bought a j5create hub with 3 USB3 ports, which is connected to one of the type C ports. Flash drives work perfectly, but not my large capacity (250GB to 4TB) powered ext. USB 2 & 3 disks. They work OK in the sole 'standard' USB port.

I tried disabling the enhanced power management option on the hub and ext. disks in their respective properties via Device Manager, but to no avail.

The new hub does have a 5v connection point, presumably for additional power. Maybe this will solve the problem, but at present I can't find a source in order to buy one!

I believe the C type ports are backward compatible, so my question is, do I need additional power through the hub, or is there another solution to my problem?

Thanks and kind regards.

All I have is the hub. Being new to C-Type I assumed this would be all I needed. However, following your excellent suggestion, I will now check out the alternatives.

I have a small adapter cable for the small port to the standard port called OTG/On The Go, got it from Dell when I got the 8" Venue tablet. It was necessary as the tablet doesn't have a standard USB port.

Today I visited the retailer, along with the hub, my laptop, flash drive and 4TB ext, disk. There, the hub was demonstrated not to work with the 4TB, but OK with the flash drive. We tried a new, replacement hub of the same make and this worked for both, so now I am back home, hoping the hub will continue to work. Currently, there are 2 large capacity ext. disks running on it.
Notwithstanding the existence of a 5v power socket on the hub, several retailers have confirmed the relevant adapter is not available, even from the hub manufacturer!
I will monitor the situation for a day or two. My thanks to those who responded.

Hi there

even with powered hubs sometimes large capacity external HDD's still need their own separate power supply.

Remember also especially for smaller form factor computers it's not the hub that has the problem but what the computers bus can allow as max power.

Just because the computer has an i7 CPU doesn't mean that the bus is capable of driving several 4 TB large HDD's concurrently or even at all. The problem here isn't with defective hardware but simply of basic physics / electrical engineering.

Cheers
jimbo

Thanks for the explanation Jimbo. I am not at all knowledgeable in these matters, so your wise words throw a new light on my situation. Anyway, all seems OK at present. I live in hope!
Regards.

Having monitored my replacement hub for a short period, all seems to be working very well. I can only assume the original hub was faulty in some way. Again, thanks to all who assisted with this, for which i am most grateful.