I know you use the word hub, but are you looking for a simple USB-C hub with just additional USB ports, or a dock with display ports, charging etc?
Well, there’s docks that allows you to connect several USB-hard drives but they are often a bit more expensive and the ones I know of don’t have smart card readers built in.
Are you looking at powered or unpowered hubs? You have to remember that the hub is also providing enough current to actually power the drive in addition to connecting it. So if you want to power two drives you probably want a hub that connects to its own AC (wall) power supply.
The exception is that if you're connecting desktop-type drives that already have their own wall AC connection, you might be able to get away with a standalone unpowered hub since it's only for the connection and not providing the power.
I read these cables cut the internet.
https://www.amazon.com/gp/product/B07CKR8DXJ/ref=ox_sc_saved_title_1?smid=A21TE5CLHZDYA7&psc=1
My main purpose is to be able to connect two external hard drives at the same time (without cutting of the internet)
Oh only two hundred dollars?Maybe not dock you'd think about at first thought, but this one should work fine for what you want:
https://www.dell.com/en-us/shop/dell-universal-dock-d6000/apd/452-bcyt/pc-accessories
I'm assuming you get that answer from the Amazon Q&A? I don't know what to say -- I've been using USB devices for a long time and haven't encountered any of this "interference". I have a feeling if it was as common a problem as that dubious answer implies, we'd be hearing a lot more about this.
Would something like this work for your purposes? https://www.amazon.com/TOTU-Ethernet-Delivery-Portable-Laptops/dp/B07FX2LW35 It seems to plug into external power so theoretically I'd imagine it could power two external drives?
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Oh only two hundred dollars?
Unfortunately, that won't work. It says the following under the product description...
"Not intended for use with high-power devices (external hard drives, iPads, etc.)"