SQL Server 2014 :: Linked Server To File Folder Security

Here is my Problem:

1. I have sql 2008 R2 running on my LocalHost.
2. Created Data Base [Customer].
3. Created Linked Server [CUSTOMERLINK] USING Microsoft Jet 4.0 to link to Drive F:Data which has DBF files in it.
4. Create dbo.Customer_Upload Table.
5. INSERT INTO [Customer].[dbo].[Customer_UpLoad]
([Name],[Email])
SELECT
NAME,EMAIL
FROM [CUSTOMERLINK]...[CUS]

All this works fine. I can even put it in to an After Insert Trigger on another table and it works.

My problem is that I need this to work in a scheduled job.

F:Data is just a folder with files in it.

This info is from a Restaurant POS system and I need to update it every night.

I have tried every which way to to setup the security issue as there isn't any login security on the folder and SqlServerAgent wants security.