Re: External hard drive won't show up...
Make sure you don't have it trying to use a drive letter held by another drive. This is a common reason for USB sticks, portable hardddrives, network drives, etc for not showing up. To check this have the drive plugged in and go to Control Panel -> Admin Tools -> Computer Management -> Disk Management, if the drive is working properly but not showing up you'll see it in your volume listing without a drive letter. Change the drive letter to something that isn't used and it should appear.
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