每当我使用GUI将USB外部驱动器上的大文件夹压缩到相同位置（外部驱动器）时，右键单击“ Compress ...”选项，然后选择.7z单选按钮，我会在root用户中看到可用空间缓慢下降直到达到200mb，压缩失败。看起来由于某种原因文件正被写入根目录以及外部驱动器。
I have been trying to identify the file which is filling up but have been unable to narrow it down and cant work out why my root directory is even being writ too... I saw in another post to use
sudo du -ax / | sort -nr | less -S which i have piped into two txt files for before compressing and around half way through compressing which i can provide but are massive and i cant see any differences big enough to explain it. I have also looked at var/log files but cant see anything filling up there.