You might receive an issue where you require to find all the files that are owned by a specific user.  Run the below command to find all files on the server owned by the specific users.

find / -user $USERNAME 

You need to replace $USERNAME with the exact username for which you want to search the files. However, the above command may take some time to find out the files in the entire file system. You can run the below command that will store the output in a file called users_file.txt. Files owned by the entered username will be stored in a users_files.txt file.

find / -user $USERNAME > users_files.txt