I'm digging into the SMI SM3271AC1 — here’s a concise, shareable breakdown you can post.

The result? You double the capacity and (almost) double the write speed. This is a classic data hoarder mod for creating cheap, high-capacity USB 2.0 drives from e-waste.

Beyond generic unbranded drives, this controller is documented in products from: (Slim/Mini waterproof series) (Selected 64GB models) (Used in some budget recovery-tool-compatible drives) download link for the Dyna Mass Production tool to fix a broken drive?

Based on user reports and product data, the typical performance of a drive using this controller is as follows: Max Read Speed is approximately equal to Max Write Speed is approximately equal to Capacity Support : Commonly seen in : USB 2.0 (High Speed). Known Reliability Issues