re roundcube helm hmailserver on windows

[plzz_help]

Hi
i am using mailenable with helm 3, but i am planning to shift to hmailserver with roundcube webmail software.
what i want to know is will the files that are stored by roundcube themselved be accounted in the total usage of the domain by helm, or another way to ask the question is will the files stored for each email id be accounted by helm into the total diskusage of the domain by helm 3.

Please help