Hi,
Part of the Recover My Files 'drive recovery' scan is a sequential scan over the lost drive looking for "Lost Files". In most cases, you do not actually need to do this.
Please watch the video here, or read the instructions (particularly the part in green) which talks about speeding up the search:
Recover a Formatted Drive with Recover My Files v4
In your case the analysis part should not take very long (only a few hours a the absolute most).