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U盘分配单元大小怎么设置？

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　　我们在对U盘进行格式化的时候需要分配单元大小，合理的单元分配可以提高U盘的读写速度还不会浪费储存空间，但是一些不了解的用户就不知道要怎么设置了。下面我们就来看看详细的设置教程。

　　具体解析如下：

　　1、首先来说U盘的默认格式化的方式都是FAT32的（FAT32不支持大于4G的文件），或者可以使用exFAT的格式（NTFS分区是采用“日志式”的文件系统，需要记录详细的读写操作，会比较伤闪盘芯片，因为要不断读写。一般不建议U盘使用NTFS分区），exFAT是比较新的一种专门针对移动存储设备的格式化格式，支持单个大于4GB的文件的操作，对于分配单元大小可以简单的说分配的单元的数值越大读写越快，但是存储空间会浪费。

　　2、所谓分配单元大小，即是系统对磁盘以及移动存储设备进行读写的最小单位。在极限速度以内，分配单元大小设置越大读写速度越快，反之则越慢。但是这里要注意一个问题，单元分配越大越会造成空间的浪费，这就好比你拿许多同样大小的正方形纸片要将一个形状完全覆盖，纸片的面积越大越省事，但是相比于较小的纸片，边缘会有更多的无用面积，磁盘分配单元也是同样的道理。

　　3、格式化的时候的选择方式建议使用默认数值，系统会为你调节到最匹配的默认数值，无需手动管理，之后选择快速格式化后就立即生效了。当然如果你日常使用的文件一般都较大，那么建议设置的更大些，比如32K甚至是64K。这样会明显的改善写入速度，当然也会浪费更多的空间。

　　格式为FAT32

　　格式为NTFS

　　格式为exFAT

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