Complex sentence: One downside to the GameCube Game Disc is the relatively small storage; some games with large amounts of data had to be placed across two discs, such as "Resident Evil 4".
Split into simpler sentences: One downside to the GameCube Game Disc is the relatively small amount of storage they provide. As a result, some games with large amounts of data needed to be placed across two discs, such as "Resident Evil 4".