Which item would help improve performance by managing storage on an Apple device?

Using cloud storage solutions is a practical way to improve performance on an Apple device by effectively managing storage. When users offload files, photos, and documents to cloud storage, they free up space on their device. This can lead to enhanced performance since devices often operate more efficiently with ample free storage. Running low on storage can slow down system processes, hinder updates, and limit the ability to install new applications or store new data.

In contrast, defragmenting the hard drive is not a relevant solution for Apple devices, as macOS and iOS file systems are designed to minimize fragmentation automatically. Downloading additional apps could actually exacerbate storage issues and potentially slow down the device. Prioritizing Wi-Fi over mobile data might improve connectivity speeds for certain tasks, but it doesn't directly address storage management or improve performance through freeing up space.