how to make usb hub ?

You can't easily. As Ork says, buy one.

A Hub isn't a load of sockets wired together, it has to contain a smart IC to route signals and power to everything.
orksecurity3 years ago
Get USB hub chip, wire connectors to it.

Probably easier and cheaper to buy one off the shelf and then (if you're so inclined) move it into a new case...

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