This registry fix only inserts a key used by the FL driver to disable the U1/U2 power states I think, but you are using this at your own risk. Insert the fix into your registry, by double clicking it on windows. (c) Download, decompress the Fresco Logic registry fix. I obtained mine from the FL support web page. (b) Download and install the latest FL USB3 drivers. (a) Upgrade the firmware of your WD Passport via the Firmware Updater. Therefore I find their poor support disproportional to the problems their bugs have caused to unsuspecting users. I must also note that I have emailed Fresco Logic support twice at the beginning of 2014, asking them for information, a fix or comment, but they have not replied, or chose to ignore my email. Note that my drive still disconnected a couple of times, however only when the computer it was attached to was left for hours unattended and certainly not while in use. I have installed it along with the latest Fresco Logic USB3 drivers v3.5.106.0, which seems to work quite well. I have mirrored it here, in case the original file disappears.

UPDATE : therealone, a user over at WDC Forums has posted a registry fix that Fresco Logic sent him.