please forgive my english im from portugal. i have this 2TB drive WDC WD20 EARX-008FB0 its almost new, today i installed it in an external case and plugged it in the usb port of my laptop, a window popped up asking to format the drive because it hasnt any partition. chkdsk says the filesystem is raw…

Hi it could be the external case does not support 2tb drives. See if you can find a PC to plug the drive directly into the motherboard sata controller