I just purchased a 1TB Seagate Backup Plus Drive two days ago. I plugged it into my desktop sometime late last night. Had no problems with it being recognized. I then proceeded to copy over a 38.5GB folder and at some point during the copy process (or after copying had completed) It started beeping. Although I had been sitting right there at my computer, I was watching some BrEXIT videos on YouTube and had my headphones on, so I don't know how long it had been beeping. The folder appears to have copied over without error and I have the drive plugged into a powered USB hub. Now every time I plug it back into it beeps.. Gonna try and do some troubleshooting to determine if the beeps happen across the board or if for some reason it's isolated to that hub. Fortunately I did register the driver with Seagate the same night I purchased it. This is the first Seagate HDD that I've had in a long time. So if this turns out to be something (or anything) to do with the drive itself, then that'll be it for myself and Segate. If I discover anything worth sharing during my troubleshooting efforts I'll come back and provide an update.
UPDATE: As many of you said, it was an issue with the power to the drive. To be honest, I have too many external USB drives connect. Reason being is that 3 of the SATA ports on the mobo are broke. My solution was to grab a couple of the NXT USB expanders (plug into the USB head on the mobo). This did the trick. But now with at least 7 HDD plugged into those NXTs and the other various ports I have a USB HDD plugged into, it's ended up drawing too much power on some of those ports.
Using a tool like USBtree . You'll be able to see how much power each individual USB pot is actually drawing (there's quite a bit more that USBtree can tell you;l ie. what devices are plugged into which ports) . This is helpful, if your in a situation like mine, are experiencing some of the same symptoms/problems that I was, or what to simply know which USB ports provides the most electrical power to devices plugged into it (which would be good to know if you have a high draw device/peripheral (or an older USB peripheral..or can't find the AC adapter for a device, or have the need to daisy chain a a bunch of external USB HDDs together.
NOTE: from both a feature viewpoint and from a UI/usability point of view USBtree takes a bit of figuring out.....it's not the most intuitive app/utility that I've ever used. In fact, it probably was one of the least friendly/intuitive. However, in the end it did tell met what I needed to know and had the information that I was looking for find.
-- I was also able to determine that one of my older 2.5" external USB HDD what I thought had started making the 'click of death' actually wasn't. Just as with that [then] new Seagate portable 1TB external HDD, the problem actually had something to do with the power draw on the USB port not being sufficient to meet the demand being placed on it.