Locate the USB ports, of whatever flavor, far enough apart to allow them all to function at once. My latest laptop has three USB ports: 2 USB 3.0; one USB 2.0. The manufacturer put the USB 3.0 ports so close together that using more than one at a time becomes a dubious proposition.
The side-by-side placement of the USB 3.0 ports renders plugging in more than ONE standard sized USB 3.0 flash drive virtually impossible. Even plugging in a USB cable next to a standard flash drive crowds the space and risks breaking loose one or both ports. Examples might include a USB hard drive or USB hub next to a 128 GB flash drive,
While purchasing a very narrow, and often limited, USB 3.0, flash drive can enable one to use two devices at the same time, it does not really make up for the lack of space between the drives.