ðɪ ˌiːˌɛfˈaɪ ɛkstˈɛnsᵻbəl fˈɜːmwɛɹ ˈɪntɚfˌeɪs sˈɪstəm pɑːɹtˈɪʃən ɔːɹ ˌiːˌɛspˈiː ɪz ɐ pɑːɹtˈɪʃən ˌɔn ɐ dˈeɪɾə stˈoːɹɪdʒ dɪvˈaɪs jˈuːʒuːəli ɐ hˈɑːɹd dˈɪsk dɹˈaɪv ɔːɹ sˈɑːlɪdstˈeɪt dɹˈaɪv ðæt ɪz jˈuːzd baɪ kəmpjˈuːɾɚz hˌævɪŋ ðə jˈuːnɪfˌaɪd ɛkstˈɛnsᵻbəl fˈɜːmwɛɹ ˈɪntɚfˌeɪs jˈuːfi.
The EFI (Extensible Firmware Interface) system partition  or ESP is a partition on a data storage device (usually a hard disk drive or solid-state drive) that is used by computers having the Unified Extensible Firmware Interface (UEFI).