about the size of hard disk please

hello,,
please I need help
I'm using CWP OS in my vps
I have HDD 2TB
and I'm using just 300GB in my sites
the problem is when I enter this command in ssh  df -h

I found I'm using all my HDD size
see here what i Mean
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       1.6T  1.3T  250G  84% /
none            3.6G     0  3.6G   0% /dev/shm
see here please
6.4G    alfarabi
325G    sassertu
1.9G    sasserup

325+6.4+1.9 = 333.3GB
 this is my sites what I'm using
please can some one help me and tell me where is the problem ?

you should check if the backups are taking additional disk space

Example 300GB + 3 x Backups
daily
weekly
monthly
= 1200 GB

hello sir,, thank you for reply
please tell me how can I check this backup if I didn't use any backup in my site
and how can I stop the backup if it is automatically

by the way please tell me  when I add new account I found there backup ( backup user)
what is this mean?

another question please
how can I find the backup and delete it  if it is there

To see if an account has backups enabled: n the CWP web interface, User Accounts -> List Accounts -> Edit Account see if Backup is checked. Backups are located in /backup

you can delete backups from your /backup folder.

but this wouldn't be recommended as then you would be without any backup, at least you should have monthly.