8G优盘格式化成exfat，在分配单元大小方面应该选择多少容量？
推荐回答（5个）
U盘格式化分配单元大小的选择，单元格越大读取速度越快，但占用空间越大，单元格的大小最好是选择系统默认。操作方法如下：
1、首先把U盘USB口弄出来，然后插入到Mac。
2、然后打开电脑，点击启动台与磁盘工具，如下。
3、然后在打开的工具页面中，找到并点击apfsU盘。
4、然后在页面上方点击抹掉，点击格式，选exfat。
5、最后点击窗口右下角的抹掉，那么即可格式它为exfat。
第一，32768 KB相当于32GB。
第二，不管是硬盘还是U盘的格式化，分配单元大小都选默认为好，这是微软自动优化选择的格式。具体看这里微软的官方文档：http://support.microsoft.com/kb/140365/zh-cn
第三，
下表描述了默认的簇大小为exFAT的。
卷大小对应簇大小
6 MB 4KB
256 MB–32 GB 32 KB
32 GB–256 TB 128 KB
TB 256 不受支持
支持的操作系统操作系统Windows
7，Windows Server
2008 R2、 Windows Server
2008，Windows Vista、 Windows Server 2003，Windows XP
选择默认就是32KB，千万别格式化成你选的32768 KB以上KB了，可能导致U盘无法使用。
1、U盘格式化分配单元大小的选择，单元格越大读取速度越快，但占用空间越大，
单元格的大小最好是选择系统默认；
2、exfat格式的优势：可以支持4g以上的大文件，但手机OTG不好识别；
3、8g的U盘容量本身不大，再存大文件就很紧张了，不建议格式化成exfat，还会影响兼容性。
∵1GB=1024MB
1MB=1024KB
1KB=1024B
∴32768KB=32MB=0.03125GB
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