If you buy a new backup hard drive, chances are it’ll have an ultra-fast USB 3.0 interface. But if you plug it into your old desktop PC with a USB 2.0 port, it’ll run at half speed and your backups will take longer. The good news is you can probably upgrade your desktop to USB 3.0 for about $30. Here’s how.
Open the computer and look for an empty PCI-E slot (Photo 1). If you find one, buy a USB 3.0 PCI-E peripheral card (one choice is the Anker Uspeed PCI-E to USB 3.0 with 20-pin connector; $19 at amazon.com). If you want to access the high-speed ports from the front of the machine and have an empty drive bay, buy a USB 3.0 front panel (such as the Anker 3.5 inch Front Panel 2 USB 3.0 Ports; $10 at amazon.com).
Install the PCI-E card (Photo 2) and the USB front panel (Photo 3). Then fire up the computer and install the software drivers that came with the card.