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内部主控与协议错配：很多标称NVMe的便携盘用USB-SATA桥接主控，实测只有400-550MB/s，选购时看清是否为USB-NVMe（如ASM2362/JMS583主控）方案再谈高速

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便携固态硬盘category

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Unverified外接协议决定速度上限：USB 3.2 Gen2（10Gbps）实际读写约1000MB/s，USB 3.2 Gen2x2（20Gbps）约2000MB/s，雷电3/4（40Gbps）可达2800MB/s+，但需主机接口匹配，否则协议自动降速77% similar Unverified接口协议决定实际速度：USB 3.2 Gen1(=USB3.0)理论5Gbps约500MB/s，Gen2达10Gbps约1000MB/s，Gen2x2达20Gbps；买了PCIe SSD却只配Gen1接口是性能浪费，选购时接口协议要匹配盘体速度76% similar

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