In the world of USB flash drives, the controller is the unsung hero. While most users focus on storage capacity (64GB, 128GB, 512GB) or brand names (SanDisk, Kingston, Corsair), the controller determines real-world speed, reliability, and compatibility.
Hardware Bottleneck: The slow performance is typically attributed to the pairing of this "old-style" controller with budget NAND flash packages, a combination common in entry-level drives. phison ps225109
The PS225109 is a chameleon. If paired with high-quality 3D TLC NAND, it will feel like a budget SSD (200 MB/s reads). If paired with bargain-bin QLC NAND, it will drop to 15 MB/s writes. The controller is fast, but the memory chips it talks to are the bottleneck. The Phison PS225109 (PS2251-09): A Deep Dive into the USB 3
Body: