error: file write error: No space left on device - macos

Question

I am attempting to update my git repo by doing "git add ." within Visual Studio Code on my MAC. I have done this many times without issues but this time it is giving me this error "error: file write error: No space left on device" and "error: unable to create temporary file: No space left on device." Also when trying to clone another repo onto my device from github it says "fatal: could not create work tree dir 'cs1550-project1-domm2': No space left on device" I have 12.96gb left of 256gb. I do not know how I am out of space or how to free it. I just need to update my github repo for class.
This is running df -h within the VS terminal:
df -h
Filesystem Size Used Avail Use% Mounted on
udev 31G 0 31G 0% /dev
tmpfs 6.2G 5.2M 6.2G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 196G 22G 165G 12% /
tmpfs 31G 0 31G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 31G 0 31G 0% /sys/fs/cgroup
/dev/sda2 976M 310M 600M 35% /boot
/dev/loop0 56M 56M 0 100% /snap/core18/2253
/dev/loop2 62M 62M 0 100% /snap/core20/1270
/dev/loop1 56M 56M 0 100% /snap/core18/2284
/dev/loop3 44M 44M 0 100% /snap/snapd/14295
/dev/mapper/ubuntu--vg-lv_u 1.6T 1.6T 0 100% /u
/dev/loop6 44M 44M 0 100% /snap/snapd/14549
/dev/loop5 68M 68M 0 100% /snap/lxd/21835
/dev/loop4 62M 62M 0 100% /snap/core20/1328
/dev/loop7 68M 68M 0 100% /snap/lxd/21803
AFS 2.0T 0 2.0T 0% /afs
tmpfs 6.2G 0 6.2G 0% /run/user/16778380
tmpfs 6.2G 0 6.2G 0% /run/user/16778801
tmpfs 6.2G 0 6.2G 0% /run/user/16778557
tmpfs 6.2G 0 6.2G 0% /run/user/16777582
tmpfs 6.2G 0 6.2G 0% /run/user/16778716
tmpfs 6.2G 0 6.2G 0% /run/user/16778813
tmpfs 6.2G 0 6.2G 0% /run/user/16777367
tmpfs 6.2G 0 6.2G 0% /run/user/16778536
tmpfs 6.2G 0 6.2G 0% /run/user/16778347
tmpfs 6.2G 0 6.2G 0% /run/user/16778708
tmpfs 6.2G 0 6.2G 0% /run/user/16778462
tmpfs 6.2G 0 6.2G 0% /run/user/16778799
tmpfs 6.2G 0 6.2G 0% /run/user/16778330
tmpfs 6.2G 0 6.2G 0% /run/user/16777512
tmpfs 6.2G 0 6.2G 0% /run/user/16778756
tmpfs 6.2G 0 6.2G 0% /run/user/16778555
tmpfs 6.2G 0 6.2G 0% /run/user/16778783
tmpfs 6.2G 0 6.2G 0% /run/user/16778747
tmpfs 6.2G 0 6.2G 0% /run/user/16778712
tmpfs 6.2G 0 6.2G 0% /run/user/16778329
tmpfs 6.2G 0 6.2G 0% /run/user/16777696
tmpfs 6.2G 0 6.2G 0% /run/user/16778494
tmpfs 6.2G 0 6.2G 0% /run/user/16778816
tmpfs 6.2G 0 6.2G 0% /run/user/16778752
tmpfs 6.2G 0 6.2G 0% /run/user/16778706
tmpfs 6.2G 0 6.2G 0% /run/user/16778823
tmpfs 6.2G 0 6.2G 0% /run/user/16778556
tmpfs 6.2G 0 6.2G 0% /run/user/16778766
tmpfs 6.2G 0 6.2G 0% /run/user/16778343
tmpfs 6.2G 0 6.2G 0% /run/user/16778828
tmpfs 6.2G 0 6.2G 0% /run/user/16778538
tmpfs 6.2G 0 6.2G 0% /run/user/16777510
tmpfs 6.2G 0 6.2G 0% /run/user/16778809
tmpfs 6.2G 0 6.2G 0% /run/user/16778353
tmpfs 6.2G 0 6.2G 0% /run/user/16777596
tmpfs 6.2G 0 6.2G 0% /run/user/16778342
tmpfs 6.2G 0 6.2G 0% /run/user/16778822
tmpfs 6.2G 0 6.2G 0% /run/user/16778540
tmpfs 6.2G 0 6.2G 0% /run/user/16778542
This is running it through my MAC terminal:
df -h
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk1s5s1 233Gi 14Gi 12Gi 55% 553788 2447547532 0% /
devfs 196Ki 196Ki 0Bi 100% 679 0 100% /dev
/dev/disk1s4 233Gi 3.0Gi 12Gi 21% 4 2448101316 0% /System/Volumes/VM
/dev/disk1s2 233Gi 320Mi 12Gi 3% 1226 2448100094 0% /System/Volumes/Preboot
/dev/disk1s6 233Gi 24Mi 12Gi 1% 17 2448101303 0% /System/Volumes/Update
/dev/disk1s1 233Gi 203Gi 12Gi 95% 576260 2447525060 0% /System/Volumes/Data
map auto_home 0Bi 0Bi 0Bi 100% 0 0 100% /System/Volumes/Data/home
df -i
Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk1s5s1 489620264 29961272 24759664 55% 553788 2447547532 0% /
devfs 392 392 0 100% 679 0 100% /dev
/dev/disk1s4 489620264 6294912 24759664 21% 4 2448101316 0% /System/Volumes/VM
/dev/disk1s2 489620264 654696 24759664 3% 1226 2448100094 0% /System/Volumes/Preboot
/dev/disk1s6 489620264 49528 24759664 1% 17 2448101303 0% /System/Volumes/Update
/dev/disk1s1 489620264 426413408 24759664 95% 576260 2447525060 0% /System/Volumes/Data
map auto_home 0 0 0 100% 0 0 100% /System/Volumes/Data/home

Answer 1

It depends on where you are trying to do the git add .
As mentioned here:
The /snap mounts come from using software packages installed with Snap.
These utilize loop devices and are usually not writable.
You will get some sort of "No space on device" error when trying to write to any of these locations and that is represented in df -h as showing those mounts as 100% in use.
But in your case, assuming the repository is in /dev/...:
devfs 392 392 0 100% 679 0 100% /dev
That means you don't have enough inodes.
Look for files to delete:
for x in /* ; do echo $x ; find $x | wc -l ; done
The goal is to free inode usage or increase the number of inodes.