Originally Posted by brkn

You could as well go with

Code:

cd /
du -k * | sort -nr | head

which will give you a reverse ordered list from biggest to smallest file (filesize is shown in kilobytes).

Seems like home/user is pretty loaded but definetely not full.
Next culprit is usr/ and opt/ so should I just delete files from there or this will destroy my phone?

Or you could just check folder sizes with

Code:

du -sh * | sort -nr | more