# busybox3 ls -lFhAv /data/media/0/DCIM/.thumbnails
total 64K
-rw-rw-r-- 1 media_rw media_rw 3.7G Nov 21 12:06 .thumbdata3--1967290299
# lsof|grep 'deleted'
// 无对应的文件输出
这个文件是干嘛的？空间没变化这点 why ？
这人也说没影响: https://www.worldcadaccess.com/blog/2013/07/how-to-reclaim-1gb-from-your-androids-disk-space.html
has at least removed the thumbdata file but it doesnt have effect on my memory.. previously, my phone was having a free space of approx 900 MB. now even after removing 2 thumbdata files of apporx 450 MB its still shows 1.0 GB free space in my phone.. it should be around 1.8 GB
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