Please find more information on the New Grand Scenic here, and about your multimedia system R-LINK 2 here. For a software upgrade, you don’t need an sd card, but an USB stick, in FAT 32 format (8GB-32 GB). You can read about it in more details here: New R-LINK 2 / Software upgrade installation guide.
SanDisk Ultra 64 GB, SDHC Class10
works fine with my rlink v. 3.3.16 on renault koleos II