I need help importing data in Access 2013

Hello Experts,
I need help with a feature I need implemented to an Access 2013 application.
I am developing a scheduling app.  The staff members email me their availability on a spreadsheet.  
I then save those spreadsheet to a specific folder in my C drive (C:\Schedules\).

I have a table in Access 2013 where I save the data in the spreadsheets into.  This is tedious work.

I want to create a form in Access 2013 with just 1 button, that will read all the files in the C:\Schedules directory.
And import the information into my schedules table.

Image of what my C:\Schedules directory

Here is a sample of the information that the spreadsheets contain:

USER ID            DATE_AVAILABLE            EMAIL            PHONE
100001            11/1/2014            me@test.com      111-112-2233
100001            11/2/2014            me@test.com      111-112-2233
100001            11/9/2014            me@test.com      111-112-2233
100001            11/12/2014            me@test.com      111-112-2233
100001            11/13/2014            me@test.com      111-112-2233
100001            11/14/2014            me@test.com      111-112-2233      


My tblSchedules table in Access has the same fields:
USER ID            DATE_AVAILABLE            EMAIL            PHONE


How can I do this?  Thank you in advance for all of your help.


mrotor