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Usb has exceeded power limits

Last response: in Storage
a b G Storage
February 13, 2010 3:28:40 AM

when i connect my 250 external it shows a usb has execeed power limits
February 13, 2010 5:09:42 AM

250 what? What you using? external hdd?
I had a similar problem for a bit few months ago when i made my own usb case fun mod thing... it disappeared quickly enough
a c 415 G Storage
February 13, 2010 7:03:38 AM

If it's a full-sized external drive, that's normal. It's generally only the 2.5" external drives that have low enough power needs that they can be powered by a USB port.

USB 3.0 may change this since it permits attached devices to draw somewhat more power than USB 2.0.
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a b G Storage
February 13, 2010 2:45:28 PM

try a powered usb hub, they are a few bucks at any local shop
a c 351 G Storage
February 15, 2010 2:47:40 AM

Sminlal is correct, and 505090 provided the corrective action for a 2 1/2 in HDD. For a 3 1/2 in drive a 12 Volt brick is required Vs the 5 Volt usb hub brick.

3 1/2 in regular HDDs require +12 V, not provided by a usb port. Usb Ports are low current (power) and even some of the 2 1/2 in HDDs exceed the power limitations for a usb port and require a "Brick"