3TB, 4TB and 5TB drives are now getting more and more common. But they have to be formatted a specific way in order for both Windows and Mac to recognize the full capacity. For Windows, it’s with the “GUID partition table (GPT) partitioning scheme”. If you buy it as an external drive like from Seagate, then it’s already formatted for you.
Except, I just had one stop being recognized by the Win 7 computer for a while. I thought the drive had died from when the USB interface that was in the bottom of the drive case came loose. Crack open the case, plug in a different USB interface and then it kinda starts showing up as an unformatted drive. Then as a 750GB drive. Then as a pair of about 375GB drives. Then all of a sudden, it’s back to working completely and showing the full 2.72TB and the files I had on it.
From what I can see, having them show up as 750GB drives is common because that’s the leftover amount from when the OS stops recognizing the drive size. There’s quite a few messages about people trying to follow the directions on formatting it correctly and setting the partition correctly and still not being able to get it to work. I did too on the first 3TB drive I bought to replace a drive that was acting like it was going to die. Took it back and exchanged it for a 2TB drive.
And now with this formerly external 3TB drive which is now sans case and will be used as an internal drive, I don’t want to have to keep fussing with trying to figure out what will make Windows happy and deign to format the silly thing. Can I just tell it to give me two partitions so that one of them is less than 2TB and whatever’s left over is in the other partition? If I can do that, I’d rather have two reliable partitions than one big partition.