qBitorrent: Wrong Free Disk Space

Hi,

Would anybody know why the “free disk space” as visible in qbittorrent is different from what I can see on the filesystem using df?

See example below, where qbittorrent states that I got 1.5 TB remaining, whereas in reality I have 1.6 TB

Bildschirmfoto 2023-04-03 um 09.32.22

$ df /dev/sda1 -ah
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 1.9T 322G 1.6T 18% /media/seagate

different rounding? best to ask qbittorrent.