So, I just realized that my root partition which is 50 GB, only has 6 GB free space.
p.s: I have separate root and home partition, my home partition is 180 GB and I have a 1TB HDD drive too which I use for my most of my big files.
Should I do anything? like resizing or anything(just guessing), or it has enough space?
edit: I've never saved personal files on my root partition
second edit: So I did a scan on the partition and here's how is my root partition that big
I have 26 GB on /var (21 GB on /var/lib, 20 GB of it on /var/lib/snapd and on snapd, 14 GB is on /var/lib/snapd/snapshots) and 5 GB on /var/log)
and 14.1 GB on /usr (8 gb on /usr/lib and 4 gb on /usr/share)
these were the big files