How do I tell if my PC is USB 3 capable?

Hi,

Thank you for posting in Microsoft Community, we appreciate your interest in Windows 10.

As per the description I understand your concern about identifying whether the PC has USB 3.0 ports to support those devices, we will help you with this issue.

Do let us know what exactly do you mean by: Also do I still need the Windows 7?

I would like to inform that you can see the symbol  (USB 3.0 symbol) on the USB port of the device and it tells which port of your device is for USB 3.0.

Also, you can check for the USB 3.0 drivers from Device Manager.

1. Press Windows + X, click on Device Manager.
2. Locate the Universal Serial Bus Controller and expand.
3. Check if you can find any port with USB 3.0.

For more information refer: Install USB 3.0 and other USB devices

(Applies on Windows 10 as well)

If your referring to the Windows.old folder created after upgrading from Windows 7 to Windows 10, I would like to inform that you can delete that folder provided that you will not be able to rollback to previous operating system.

Hope it helps. Feel free to contact us for further assistance on Windows Operating System, we will be happy to help you.