Unverified88% confidenceDecision RuleTime unknown
标称USB 3.0但读写速度只有30-40MB/s的低价U盘，实为TLC/QLC颗粒+老旧主控，写入常掉速到10MB/s；选购应认准明确标注读≥100MB/s、写≥50MB/s的型号
1
Sources
88%
Confidence
Long-term
Relevance
-
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UnverifiedU盘选购认准USB3.2 Gen2（10Gbps）接口，实测读速≥300MB/s才算合格，标注USB3.0但读速仅100MB/s以下的多为主控缩水产品86% similarUnverified实际顺序读写速度受限于USB 3.2 Gen2的10Gbps带宽上限，在仅有USB 3.0接口的老设备上速度会大幅缩水至约400-500MB/s左右86% similarUnverified同标称USB3.0的U盘，读速可从80MB/s到400MB/s差5倍，关键看主控和闪存颗粒；只看接口版本不看实测速度会踩坑，购买前应查第三方实测写入速度而非厂商标称峰值读速86% similarUnverified追求真高速请认准SSD主控U盘（如三星T系列非U盘/闪迪至尊超极速），普通闪存U盘标称的USB 3.2读速300MB/s多为读取虚标，持续写入常跌至30-60MB/s84% similar
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