Amazon.com: RocketU Highpoint Dual USB 3.0 for Mac Components : Electronics
Amazon.com: MCE Technologies 256GB SSD for MacBook Air 2015 and MacBook Air 2017: PCIe-Based 4 Lane (x4) NVMe SSD Flash Storage Upgrade - Requires macOS 10.13.x (High Sierra) or Later : Electronics
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld