Nextcloud uses 200GB? Incorrect available disk size after installation


I already read this thread but it didn’t help me since I am not using nc snapshot.

Apparrently I loose 200GB somewhere. Maybe this is not an issue with Nextcloud itself but more with my partition. These are my logs:

pi@home:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        15G  7.1G  6.8G  52% /
devtmpfs        805M     0  805M   0% /dev
tmpfs           934M     0  934M   0% /dev/shm
tmpfs           934M   34M  901M   4% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           934M     0  934M   0% /sys/fs/cgroup
/dev/mmcblk0p1  253M   46M  207M  18% /boot
log2ram          40M   34M  6.6M  84% /var/log
tmpfs           187M     0  187M   0% /run/user/1000
/dev/sda1       3.6T  891M  3.4T   1% /Disk1
pi@home:~$ lsblk
sda           8:0    0  3.7T  0 disk 
└─sda1        8:1    0  3.7T  0 part /Disk1
mmcblk0     179:0    0 14.9G  0 disk 
├─mmcblk0p1 179:1    0  256M  0 part /boot
└─mmcblk0p2 179:2    0 14.6G  0 part /

I have a 4TB Disk which is also my data directory. As you see from the 3.6TB size only 3.4TB are available, when only 891M are used. Also in the Nextcloud frontend it says that there is 3.4TB available space. This is my fstab configuration:
Bildschirmfoto 2021-01-29 um 00.10.24

Thanks for your help!

That is due to the default of an ext2/3/4-filesystem reserving 5% of the available disk space for privileged processes: Disk has 197G, but when it reaches 188G it is considered 100% full - #6 by Bernie_O

Thank you for your answer!
Since 200GB is a lot, will there be a problem if I tune it down to maybe 1%?
40GB should be more than enough for root processes right?

I would think so, yes. Especially since it seems not to be the root filesystem.

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