Resident Evil 4 on GameCube requires 19 blocks (~2.3 MB) per save file. The game spans 2 discs. You need at least one 59-block (8 MB) card; 251-block (32 MB) or 1019-block (16 MB) cards work fine. Earlier incorrect 1.5 GB figure was impossible — GameCube memory cards max at 16 MB (1019 blocks).