iMac 2019 21.5 4K Ram & Hard Drive Upgrade

[curtis242]

Hi i'm new to Mac does anyone know if it's possible to upgrade the ram and hard drive (fusion drive) on the 2019 iMac 21.5 4K model but still keep the warranty intact? by an Apple authorised service provider or someone like that? also does this model have just the SATA connector for the hard drive or does it have the blade connector as well? thank you in advance for any help and advice