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馈纸式扫描仪速度越快越贵，但速度受限于电脑USB传输与OCR后处理；20ppm与40ppm机型在家用场景实际体验差异很小，家庭办公选20-25ppm即可

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Unverified像素越高传输和OCR处理越慢，普通办公按需批量扫合同选1000万像素即可，盲目上2000万以上会拖慢工作流且文件体积暴增74% similar Unverified仅用于办公文档、照片临时转移的轻度用户不建议为20Gbps高速盘多花钱，10Gbps（约1000MB/s）盘完全够用且更便宜71% similar Unverified读写速度越快的手机U盘发热越明显，长时间大批量传输时高速款反而可能触发降速保护，日常小文件用户100MB/s左右已足够71% similar Unverified价格低、容量大是核心优势，但传输速度受限于机械盘和USB 3.0接口，持续读写速度通常在100-120MB/s左右，追求速度应选移动固态硬盘70% similar Unverified追求高速传输（如剪辑视频直接外挂盘工作）的用户不适合，机械硬盘约120MB/s的读写速度远低于移动固态硬盘，大文件拷贝等待时间明显70% similar

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