No clue here, but do the ports work with usb devices (external mouse or keyboard, to charge your cell phone, etc)? In other words, do they just not work with external storage, or are they not working at all?
If it’s a driver issue (which I think my wifi issue was) try restoring to an earlier point, or download the drivers again from Lenovo.
Hmm - googled ‘lenovo usb ports not working’ and I turned up a batch of links, including a youtube.
It’s just the drives. Other stuff works fine.
I restored to earlier updates, and the drivers as well, to no avail.
I blame Bill Gates.
Cheers, and thanks for your help,
Jim