Hi Partner,
As Mahender suggested, you could use UDS to generate the report of how much space the various entities are taking up in your system. Once you install the solution into your CRM instance, you just double-click on the solution entry in the Settings-Solutions list and a report is generated in a few minutes.
This will guide you to the entities taking up the space and, if you run it regularly, it will give an indication of growth rates.
For other files like Audit Logs, Email Attachments and Notes & Deleting Records, you could refer to this article to learn to access these file size.
Hope it would help.
Regards
Johnny
