Iomega Prestige 500 GB USB 2.0 Desktop External Hard Drive: It uses USB as a power source or there is a power cord?
269125
USB, no AC mains needed. Needs a powered USB port, not an unpowered port. Many laptops have one or two of each.
1826120
Yes. It does not run power of USB cord. You must have the power cord. I purchased 2 of these 3 years ago and have been moderately happy with them. Though now I require much greater space for my back-ups. Last year I had to purchase 2 new power cords as both of them stopped working. This is a known issue with this Lacie drive. If you buy be prepared to purchase a new power cord about every 18 months.
1170519
The computer has two usb ports that can be used to connect an external hard drive
987497
This drive is USB powered - it actually features dual USB connections in case one is underpowered on your computer. There may also be an option to use a separate power supply but I have not tried that.
1399988
I assume you plugged it into USB 3.0, right? Most USB 2.0 ports will not provide enough current to power an external HDD.
575777
No power adapter. Just the cable from the external hard drive to the computer.
2078936
I don't know what the WD hard drive calls for but I doubt it. This has the "micro" USB plug on one end, which is smaller than most external hard drives I've used have.
1473689
Iomega Prestige 1 TB USB 2.0 Desktop External Hard Drive 34275 Has worked fine so far (a couple of months).
954136
No, it is powered by plugging into an electric outlet. The USB provides a connection into your computer. This not a bus powered drive, neither it is portable.
221647
mine has a power supply which i leave hooked up. are you talking about a different drive maybe?
703541
Marginal USB power is ALWAYS a risk with drives that run off USB power. I use my portables to hold maintenance and diagnostic tools. They get plugged into different machines every week, and you never know how much power those machines will be supplying. Some machines (especially laptops) just don't put out the power required to run many drives, and some drives suck down more power than others. When you hear the metronome noise, that's an indication that there isn't enough power. Worse, I have had portable disks work fine for a few weeks or months and then start the metronome noise. When I see that a drive "doesn't need a power cable" I always look for whether it comes with a power jack ANYWAY. That way, you can always add wall power if you're having problems. The best deal of all (as far as reliability) are drives like Other World Computing's, that "don't need a power cord" but come with a power jack AND a power adapter for the same price. That way you can run it off a marginal laptop, an unpowered hub, or whatever you need to.
851587
It uses two USB ports to power micro USB devices like portable external hard disks or external DVD burners, so you have separate USB for data and power
1052512
It uses a single USB plug to power even a 1TB laptop hard drive externally. No extra power needed.
669755
Yes, it includes a USB data cable & USB cable for power. Also, the drive I received was black, not white as pictured.
2245372
There are two usb ports, one for communication, the other for additional power.I thought the same that you did-- where can I get the adaptor. It turns out that the drive works happily on 2 USB connections-- and no power adaptor. Good luck!
473268
Yes one is for power the other power/data. I am running the drive on the data cable only. It did not run from the HUB without both plugged in, so I plugged the data cable direct to my laptop and it works just fine without the power cable.
1125413
It always needs external power. It has a 3.5" hard drive, whereas the one's that run only on USB have a 2.5" (laptop hard drive). That is the main difference.