Jiayu F2 df output

shell@F2:/ $ df
df
Filesystem               Size     Used     Free   Blksize
/dev                   990.4M   132.0K   990.3M   4096
/sys/fs/cgroup         990.4M    12.0K   990.4M   4096
/mnt/secure            990.4M     0.0K   990.4M   4096
/mnt/asec              990.4M     0.0K   990.4M   4096
/mnt/obb               990.4M     0.0K   990.4M   4096
/storage/emulated      990.4M     0.0K   990.4M   4096
/system                  1.3G   726.4M   564.9M   4096
/data                   12.9G     1.1G    11.7G   4096
/cache                 123.0M     4.2M   118.8M   4096
/protect_f               8.8M     4.1M     4.8M   4096
/protect_s               8.8M     4.1M     4.8M   4096
/mnt/cd-rom              1.2M     1.2M     0.0K   2048
/mnt/shell/emulated     12.8G     1.1G    11.7G   4096
shell@F2:/ $