Low disk space on “Filesystem root” 0 bytes disk

can you help me ?
Low disk space on “Filesystem root” 0 bytes disk

~ >>> df -h                                                                    
df: /run/user/1000/doc: Operation not permitted
Filesystem      Size  Used Avail Use% Mounted on
dev             3.9G     0  3.9G   0% /dev
run             3.9G  1.7M  3.9G   1% /run
/dev/sda4       9.8G  9.3G   84K 100% /
tmpfs           3.9G   84M  3.8G   3% /dev/shm
tmpfs           4.0M     0  4.0M   0% /sys/fs/cgroup
tmpfs           3.9G   47M  3.8G   2% /tmp
/dev/loop1       31M   31M     0 100% /var/lib/snapd/snap/snapd/9721
/dev/loop4       56M   56M     0 100% /var/lib/snapd/snap/core18/1932
/dev/loop2       52M   52M     0 100% /var/lib/snapd/snap/icloud-notes-linux-client/10
/dev/loop3      163M  163M     0 100% /var/lib/snapd/snap/gnome-3-28-1804/145
/dev/loop0       63M   63M     0 100% /var/lib/snapd/snap/gtk-common-themes/1506
/dev/sda1       197M   60M  138M  31% /boot/efi
tmpfs           787M  148K  787M   1% /run/user/1000

You ran out of space. Delete stuff.

PS … for more help … usually start here:

You can free up space by removing log files mostly, if that is not enough try uninstalling some apps/games that you installed manually…
Also always provide info needed as instructed by cscs above when you ask help without providing enough info around what/why you need it.

10 GB for a root filesystem is a bit on the low side and will require some maintainance to keep going.

You can also remove packages from cache, by doing sudo pacman -Sc, which will remove all packages from cache, except those that are installed.

@Strit @cscs is there any way to expand the /dev/sda4 Size ?

Depends on your HD that is labeled as sda, pls supply output of sudo fdisk -l /dev/sda

Thank you @TriMoon

~ >>> sudo fdisk -l /dev/sda                                                                                                               
Disk /dev/sda: 698.64 GiB, 750156374016 bytes, 1465149168 sectors
Disk model: APPLE HDD HTS547
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: B8C71D86-1EDF-4C6D-AF74-D7E87DC83FCB

Device          Start        End    Sectors   Size Type
/dev/sda1          40     409639     409600   200M EFI System
/dev/sda2      411648 1074524127 1074112480 512.2G Apple APFS
/dev/sda3  1074524128 1444177608  369653481 176.3G Apple APFS
/dev/sda4  1444177610 1465149127   20971518    10G Linux filesystem

Partition 4 does not start on physical sector boundary.
~ >>>                                                                                                                                      

this is my macbook pro 2012

/dev/sda have sda1 sda2 and sda3

i installed manjaro in sda3 but manjaro OS create sda4 automaticly

Sorry i do not write english well

It seems thats all you left it.
I dont know what you have on sda3 … but manjaro root (the whole system) was installed on sda4 with only 10g left … so you would need to cut some space out from sda3.
(fair warning - resizing partitions always brings potential for fragmentation and data loss)

Thanks for all
i fix this by " gparted " app and live CD
1: resize some space
2: form live cd use gparted to resize partition to space

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