Yup. Remember folks, binary megabytes and shown megabytes differ.
To them, 200GB is 200 000 000 000 bytes.
Divide by 1024 ~= 195 312 500 kilobytes
Divide by 1024 ~= 190 735 megabytes
Divide by 1024 ~= 186 gigabytes
less filesystem overhead of course
- M4H