Have an older drive, and want to see what's on it? Migrating from one system to another, and want to ease your pain? USB-connected drive adapters like this one can help. This $35 Mac and PC device from Newer Tech is simply a cable with colorful status lights for IDE/ATA/ATAPI and SATA connections. It's compatible with any 2.5-inch, 3.5-inch, or 5.25-inch hard drive, and it works with optical drives, too.