Corsair MP600 Micro 1TB M.2 NVMe PCIe x4 Gen4 2 SSD – M.2 2242 (Used Like - New) $69.99

Compact M.2 2242 Form-Factor: Compatible with the Lenovo Legion Go and other thin and light devices, making for a great upgrade option for compatible machines.
Extreme Gen4 Storage Performance: PCIe 4.0 x4 controller delivers up to 5,100MB/sec sequential read and 4,300MB/sec sequential write speeds, for rapid throughput and response times.
Your PC Made Faster: Load games, boot Windows, open and transfer files, all faster than ever.
High-Speed PCIe 4.0 x4 NVMe 1.4 Interface: Using PCIe Gen4 technology for maximum bandwidth, the MP600 MICRO delivers great storage performance.
High-Density 3D TLC NAND: Provides the ideal mix of performance and endurance to keep your drive performing at its best for years.

$70