Do you have to have the USB plugged into the power source for this to work?
1119691
The USB Port is to plug to the power adapter to get enough power to support HDMI function. It's not for charging, because the mobile phone could not support enough power to HDMI, need outside power to support it.
506713
No. It has to be plugged into the wall. The USB hookup is fine, but not necessary. You get two cables:1. The Power Cord2. The USB ConnectorI rarely use #2, but #1 is a must. =)Hope this helps.~Mick
2106652
Ron....no, the hard drive is a plug-n-play, no external power source needed.
1545977
Yes, but not with the connected cable. You need to use your own cable through the USB port.
1800550
No you have to use the power adapter supplied. Unless you rigged up a 12 volt DC battery near it.
1527431
The short answer is no, since it always needs to be plugged in to the power supply to work, but if you have a power outlet available to plug it in where you take it, then it should work.
474735
No, I draws its power from the mother board. You may be thinking of USB hubs, which often require external power. Hope this helps.
187400
Nope. It works without any external power source and yes it works just fine.
942472
I had the same issue until I realized the unit had to be plugged into a power source via the USB in order to work. Mine has worked great ever since. Have you tried that?
948435
No problem dude! Its powerd by the USB port! You dont have to plug it on the wall
562980
Yes. The usb cord serves as the charger. The unit doesn't charge when not plugged in to computer.
22414
Yes, it does need a power source and comes with the cord. Probably would not work for you. It is a nice little unit though.
1989120
Nope! It runs on the USB power so all you need to do is plug it into your PC.
2038167
No. This device does not need external power. Direct plug and play ( like a thumb drive)
803280
I can plug it directly into a USB port but just to provide power I believe you still need to use the SD card
841348
I've got mine plugged into my computer via the USB and that works fine. If you have a computer handy you can do the same.
1797950
unless you have one of those USB Back up battery for when you don't have electricity. You'd still need to plug it into a power source. Doesn't have a stand alone battery.