The premise that American Samoa was "found" or "discovered" by Europeans reflects a colonial perspective. The islands have a deep human history long before Western contact.
Polynesian navigators settled the Samoan archipelago (including Tutuila, Aunu'u, Ofu, Olosega, Ta'ū) around 1000–1500 BCE, based on archaeological evidence (Lapita pottery). They developed a sophisticated society—Fa'a Samoa (the Samoan Way)—with complex kinship (aiga), chiefly titles (matai), and communal land tenure.
The U.S. did not "find" the islands but acquired them through great power diplomacy:
Today, American Samoa is an unincorporated, unorganized U.S. territory. Its people are U.S. nationals (not citizens unless naturalized), and Fa'a Samoa remains the cultural foundation.