Usb has exceeded power limits

when i connect my 250 external it shows a usb has execeed power limits
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More about exceeded power limits
  1. 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
  2. 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.
  3. try a powered usb hub, they are a few bucks at any local shop
  4. 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"
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