If the computer is not suplying enough power you'll know because the drive will make repeated clicking noises every few seconds. Also you will not feel the slight vibration of the disk spinning. These are two easy ways to confirm it's power and not configuration. I have the WD Passport Studio which has USB2 and FW800 and on my old PBG4 it could not deliver enough power to the drive on USB and it would click once every 1-2 seconds forever. That's why I bought the FW800 drive because I connect it on FW and have no power problems. Power really should not be an issue on most computers, I think my PBG4 was in the minority that it could not power the drive via USB. Desktop computers especially they should have no difficulties powering the drive via USB. ![]() Are all the computers you connect laptops? Could you post a screenshot of what it looks like, in Disk Utility, on the Partition tab for this hard drive? Maybe this will give an extra clue, perhaps the partition map type isn't compatible with Vista in this case, perhaps. If we can see that, and eliminate that possibility of partitions/file system being the cause, then we can with more certainty say it is a power issue. Cmd-shift-4, then click the disk utility window, will create a screenshot file on your desktop that you can attach. MacOS Sierra -Journaled vs. Make external harddrive compatible with mac and windows computer, How to format using disk utility on Mac. Exfat, fat32, journaled. My WD My Passport 1 Tb Hard drive gets detected but when i try to open any file on it, it doesnt open kunals693 Jan 5, 2014, 6:26 AM Hi, When I plug in my WD My Passport 1 Tb Hard drive, it gets. Could you post a screenshot of what it looks like, in Disk Utility, on the Partition tab for this hard drive? Maybe this will give an extra clue, perhaps the partition map type isn't compatible with Vista in this case, perhaps. If we can see that, and eliminate that possibility of partitions/file system being the cause, then we can with more certainty say it is a power issue. Cmd-shift-4, then click the disk utility window, will create a screenshot file on your desktop that you can attach. When you plug the drive in to the Windows computer does it actually spin up? What about the clicking noises? The power from the USB will power the electronics on the drive, making it appear to Windows, but if you can't supply enough power to actually start the drive motor then it will never show up. I suspect this is what is happening but it's easy to confirm just let us know if the drive is spinning or not? Ironically there is plenty of power to keep the motor running, but starting the drive is the hardest part. I heard some stories once about people 'jumpstarting' the drive either over FW or 2 USBs, then quickly changing the cable to a standard USB cable. If done quickly, the drive will still be spinning when you plug it into the computer, and there will be enough power to start the drive and maintain the rotation. Again, because the actual starting of the drive is only momentary and is what keeps it from working reliably on USB.
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