A good way to check your disk usage for folders on your Linux server is via shell.
- Download Putty.exe for this location http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe
- Open the program, in the 'Host Name' type in your IP or Domain name and click 'Open'
- In the terminal, you will be asked to input your username and password, this will usually be your default FTP credentials (Shared) or your root credentials (VPS or Dedicated)
- Once logged in, type the following command: du –h
This will list the folder and sub folder size as well as the total size of your root directory structure.