Sm3265ac !!link!!

If you see "USB 3.0" on the packaging but get <20 MB/s writes, you are likely hitting the SM3265AC's limit when paired with cheap TLC NAND.

Last updated: 2025 – Note that newer 3D NAND has largely moved to SM328x or SM3350 series controllers. The SM3265AC is now legacy but still in circulation due to low cost. sm3265ac

Fully compliant with USB 3.2 Gen1 (SuperSpeed 5 Gbps) and backward compatible with USB 2.0 High-Speed specifications. If you see "USB 3