SSMS Disk usage reports reports no data file for online database
Yes, this report fails when the database is over 2 TB.
See this connect item: SQL Server Management Studio Standard Reports - Disk Usage

Create a new 2 TB database and run the Disk Usage report to display
results.

For Disk Space Used by Data Files, rather than displaying the Filegroup Name, Logical File Name, Physical File Name, Space Reserved,
Space Used, I get a message of &quot;There is no data file for 
database.&quot;