After two commands I have found something strange: 6.5GB Used, and all files have only 250MB. I can’t update
core-ssh:~# df -h
Filesystem Size Used Available Use% Mounted on
none 6.5G 6.1G 0 100% /
tmpfs 486.1M 64.0K 486.0M 0% /dev
tmpfs 486.1M 0 486.1M 0% /sys/fs/cgroup
/dev/mmcblk0p3 294.1M 216.7M 61.9M 78% /dev/init
/dev/mmcblk0p6 6.5G 6.1G 0 100% /addons
/dev/mmcblk0p6 6.5G 6.1G 0 100% /backup
/dev/mmcblk0p6 6.5G 6.1G 0 100% /share
/dev/mmcblk0p6 6.5G 6.1G 0 100% /data
/dev/mmcblk0p6 6.5G 6.1G 0 100% /config
/dev/mmcblk0p6 6.5G 6.1G 0 100% /ssl
/dev/mmcblk0p6 6.5G 6.1G 0 100% /etc/resolv.conf
/dev/mmcblk0p6 6.5G 6.1G 0 100% /etc/hostname
/dev/mmcblk0p6 6.5G 6.1G 0 100% /etc/hosts
shm 64.0M 0 64.0M 0% /dev/shm
tmpfs 486.1M 64.0K 486.0M 0% /proc/timer_list
tmpfs 486.1M 64.0K 486.0M 0% /proc/timer_stats
tmpfs 486.1M 64.0K 486.0M 0% /proc/sched_debug
tmpfs 486.1M 0 486.1M 0% /sys/firmware
core-ssh:~# du -cshx /*
4.0K /addons
4.0K /backup
1.9M /bin
170.4M /config
52.0K /data
64.0K /dev
2.0M /etc
4.0K /home
3.4M /lib
16.0K /media
4.0K /mnt
0 /proc
8.0K /root
72.0K /run
4.0K /run.sh
436.0K /sbin
8.0K /share
4.0K /srv
4.0K /ssl
0 /sys
4.0K /tmp
71.7M /usr
72.0K /var
250.1M total