The most likely problem is your USB bus is underpowered for supporting your external hard disk drive along with other USB devices.
First, this is actually a good thing in a way. The reason is, it is actually telling you right up front that your USB
bus is underpowered for this device. That's a huge
improvement over issues caused by underpowered USB
buses in the previous model computers
. In those, we were left to having to figure out what the problem was when a USB
device inexplicably stopped or didn't work.
What is happening is, your new hard disk drive
(s) (HDD) are trying to run off of power supplied by your computer's USB
"bus" (circuitry). This is OK for USB devices needing low power. But in the case of external hard disks
, it's "iffy" whether there'll be enough power on the USB
bus to support even one of them, much less two or more. Particularly on laptop computers.
Have no fear. This problem is easily remedied. :)
You need only attach an A/C adapter to each of your external hard disk
drives and you should be OK.
If that is not an option, connect a **powered** USB
hub to your laptop and plug the external HDDs
into the hub instead.
By "powered" I mean a USB
hub that comes w/ an A/C adapter. In either case, using a powered USB
hub or attaching an A/C adapter to your hard disk drive
s will remove the external hard disks' power load from your laptop's USB
bus and provide sufficient power for the HDDs
You can find USB
hubs at Newegg
.com and lots of other online
stores. I like Newegg
because their prices are competitive, their customer service is excellent and there're customer reviews of most of their products there as well.
If you have any more questions, comments, observations - anything at all, just let us know. We're here to help.
Otherwise, PLEASE, take a moment to rate the solution that best addresses your problem. If the solution provides a "fix" for your problem, then a **FIXYA** rating would be very much appreciated. :)