Unverified85% confidenceSolutionTime unknown

购买大容量U盘务必用H2testw或FastCopy全盘测试，防止买到虚标扩容盘（实际8GB伪装成256GB），非一线品牌散货尤其高发

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Unverified购买大容量U盘/存储卡警惕扩容盘（虚标容量），到手用H2testw或F3等工具做全盘写入校验，非正规渠道低价大容量产品尤其高危82% similar Unverified不要在非正规渠道购买大容量存储卡，扩容假卡（虚标容量）泛滥，标称256GB实际仅几十GB，需用H2testw等软件实测容量后再存重要数据79% similar Unverified定制U盘的标称容量与实测常有差异，采购前务必要求供应商提供实测截图或送检，警惕黑片/扩容盘：真实32GB量产芯片格式化后可用约29GB，若可用容量明显偏高需怀疑扩容78% similar

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