Coldfusion CFDirectory mapped and local drive

A user can have several CSV files stored on his PC (C:\Users\username\Documents\payroll) or on a mapped drive
j:\documents\payroll. These CSV files are generated from an payroll application.

The name pattern of the CSV files is always PAYROLL_YYYYMMPP where YYYY is payroll year, MM is payroll month and PP is payroll period
e.g. PAYROLL_20140101.csv, PAYROLL_20140102.csv, PAYROLL_20140201.csv, PAYROLL_2014002.csv etc...


I need to read ALL the CSV file names and content from either the user's PC or mapped drive (J), depending on which selection the user made.

I tried many combinations of CFDIRECTORY but has been unsuccessfully so far.

Any help will be greatly appreciated.