有个 TF 卡，也叫做 Micro-SD 卡，用旧了空间越来越小，这么一看，有个 .Trashes 文件夹占用了过多文件。貌似是被删除的文件。。。
如果你在 MAC 或者 Linux 下，用以下命令
% cd /Volumes/USBMEM/
% rm -r .Trashes
% touch .Trashes
Windows 下忘记测试，想研究的同学自己试试吧…
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竟然自己找回来了