Western Digital My Passport Ultra for Mac User Manual - Page 28

Troubleshooting motherboard BIOS setting documentation to disable this feature or visit http:// support.wdc.com and see Knowledge Base answer ID 1201. For more information about booting from external drives, refer to your system documentation or contact your system manufacturer. Why is the data transfer rate slow? Your system may be operating at USB 1.1 speeds due to an incorrect driver installation of the USB 3.1, USB 3.0 or USB 2.0 adapter card or a system that does not support USB 3.1, USB 3.0 or USB 2.0. How do I determine whether or not my system supports USB 3.1, USB 3.0 or USB 2.0? Refer to your USB card documentation or contact your USB card manufacturer. Note: If your USB 3.1, USB 3.0 or USB 2.0 controller is built in to the system motherboard, be sure to install the appropriate chipset support for your motherboard. Refer to your motherboard or system manual for more information. What happens when a USB 3.1, USB 3.0 or USB 2.0 device is plugged into a USB 1.1 port or hub? USB 3.1, USB 3.0 and USB 2.0 are backwardcompatible with USB 1.1. When connected to a USB 1.1 port or hub, a USB 3.1, USB 3.0 or USB 2.0 device can transfer data up to 12 Mbps. If your system includes a PCI Express slot, you can achieve higher data transfer rates by installing a PCI Express adapter card. Contact the card manufacturer for installation procedures and more information. My Passport Ultra for Mac 24 User Manual