Free Hard Disk Space not usable
My Hard Disk seems to be at capacity, if I take a look at it in Files.
If I open it in Disks, I get another impression...
It seems that 5% of the disk space cannot be used, and I have the same issue with another partition, too.
Any help is highly appreciated.
On a file system formatted in ext4, by default 5% space is reserved, i.e. can only be used by root. That is to reduce file fragmentation, and, in case of system disks, to leave some disk space for root processes anytime.
You can decrease that reserved space to e.g. 1% with tune2fs:
sudo tune2fs -m 1 /dev/sde1