My macbook pro retina 13inch won't recognize my external drive (LaCie 1TB porsche design)

Hello,
I've had this drive for about 8 months and it's always worked fine. But when i connect it now to my macbook it won't show up anywhere, not with disk utility system profiler, nothing. However it does turn, i can hear and feel it spinning. Also when i connect to a windows it does show up. So I checked if it was the usbport of my macbook but when connecting my ipod there was no problem.
Any ideas?
Thx!!

Hello valleke92,
It sounds like you are unable to see your external HDD when you plug it in via USB. I would use the troubleshooting from the following article named:
USB and FireWire Quick Assist
http://support.apple.com/kb/ht1151
Check the connections
If you're using a cable, make sure that both ends of the cable are properly and securely connected to your device and Mac. Try unplugging your device and then plugging it back in. If you're connecting a FireWire device, make sure that the cable is no more than 15 feet (4.5 meters) long. If you're connecting a USB device, make sure that the cable is no more than 16 feet long. If you're making a direct connection, make sure that the device's connector is fully seated in your computer's port. If your device also connects to a power outlet, make sure it has power.
Check the system requirements
Check your device's documentation or packaging again, or go to the manufacturer's website, to verify that your Mac meets the minimum system requirements to use the device.
Check your device's power
If the device has a power switch, make sure it is on. Try turning your device off and then on again. Some devices require more power that the bus supplies. If your device came with an external power adapter, always connect it to a power source in for the best performance from your device.
Restart your Mac
Sometimes a simple restart can resolve issues. From the Apple menu, choose Restart to restart your computer. Once your Mac is finished starting up, test your device again.
Check the software
See if a newer version of software is available for your device if it requires software. Visit the product manufacturer's website.
Check your device's power
Make sure that your device is on if it has a power switch; try turning your device off and then on again.
Try a different port and cable
Connect your device to a different USB or FireWire port on your Mac. If you connected your device to a USB or FireWire hub or to a port on another USB or FireWire device that's connected to your Mac (known as daisy chaining), connect your device directly to a port on your computer. Some devices need to draw power from a USB or FireWire port to work; if you connect a device to a non-powered hub (one that isn't plugged in to a power source) or to a low-power port (such as the one on your USB keyboard), it may not work. If you have another known-good cable, try swapping the cable to see if that works. If it does, you should replace the problematic cable.
There is additional troubleshooting in the article if you need it, but it should all work you towards a resolution.
Thank you for using Apple Support Communities.
Regards,
Sterling

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I recommend following the steps in the section titled "Top troubleshooting tips" in the following article:
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