S7 for sure supports 400 and 512GB cards (and probably as everything supporting SDXC, that is cards over 32GBs, it supports all the way up to 2TiBs). With the official ROM it also supports exFAT but many alternative ROMs don’t because of patent issues (I know they were cleared up recently to some extent but things don’t change overnight). So if it doesn’t work you might try to format it in the phone (I don’t know what that does by default but obviously something supported) or to FAT32 in some other device/computer.
Ok so then my sd card isn’t recognized under linux, no way also with gparted so i think there is a probleme with this sd card and i bought a samsung 64go sd card. I go to receive it under some days and will be back to you to tell you if it works or not regards to you