How to unhide particular folder from my Seagate external HDD

Hello Sir/Madam,

I have some problem regarding my external hard drive.

I am using 1TB capacity drive. On that 700 GB is used space & 300 GB is Empty.

When i select hard disc properties (it is shows that 700 GB is used space & 300 GB is Empty).

But when i selecting all folders (in Hard drive) for checking its properties then is shows only 500GB is used.

Here in my hard disc i already have one folder namely: Software, but it is hidden and its size is 200 GB.

I already uncheck : Show Hidden files from Folder Option
And i am also using CMD : attrib -h -r -s /s /d g:\*.* (g: is my drive name)

But it is not shows my folder so what to do
plz tell me.

Thanks
Sachin Dattatray Harak