Voltage question?

[OrlandoEastwood]

Ok, I found my old external Maxtor HDD drive that my dad gave me back in 2004. It does not have the original cords with it. I was looking at it and it has:

12V 3 and it's symbol is:
___
. . .

Now, my Maxtor external that I got last October has:

12V 2 and it's symbol is:

___
. . .

They are the same except the new one is a 2 and the old is a 3. Does that matter because I want to hook this thing up and see if it works.