How many files the FileRepository can support ?

Hi, My customer has 100,000 production files generated per day, they want to store in ThingWorx and view the File by searching the file path . The files should be remained for 6 months at least , so about 20 millions records . I'm going to use FileRepository to store these files , but can it afford the files ? It seems there is no database table for FileRepository and it only rely on the OS file system to search , right ? Regards, Sean