You Do Need power plug adapter while traveling from American Samoa to Ghana.

Here is Why You Need An Adapter

The outlet and plug type used in Ghana are D and G and in American Samoa are A, B, F and I. This is how they look like.

American Samoa

In American Samoa, outlets of type A, B, F and I are in use.

Type A

Type B

Type F

Type I

Ghana

In Ghana, outlets of type D and G are in use.

Type D

Type G