Yes, that works. Just keep in mind that such large cards are preformatted with exFAT, so you have to reformat to FAT32 (with 32 KB cluster size, see: https://wiiu.hacks.guide/#/tiramisu/sd-preparation?id=sd-preparation (just the note about how to format the card correctly, not the whole page)).i have a 128GB SD, so i think It should work for the dump