Can you use one Passport on two computers or do you need to purchas another passport for each computer?
You can use it on as many computers as you want. Think of it like a big USB stick…
What you’ll find is that when you plug it into a new computer, it will try and install its driver (WD SES). You’ll need that if you’ve used any of the advanced security features of the drive, but if you just want normal access without any encryption etc being present on the drive then you don’t even need that.