Can you share file name (i.e. what's <database>) or at least the extension of it?
Also, do I understand you correctly that you are connecting to MS Access file (*.mdb or &.accdb)? If yes, are you creating an extract of that or connecting live?
Tableau does create temporary folders and files at that location but unless it's an extract - we should not be copying your data around.
The file exension is .accdb. It is Access 2013. I understand that you don't need to create an extract with Access files. I want to to create workbooks for users with Tableau Reader to read. So I need to extract the files. I gues with Access you must do this manually. If I create an extract, then it shouldn't try to connect to the data source, Am I correct?
You don't have to necessarily create an extract in order to view it with Tableau Reader- you can save it as Packaged Workbook (twbx) and in this case copy of .accdb file will be stored inside that .twbx file.
With extract or not, packaged workbook with contain copy of your data, however with extracts you have little bit more flexibility (i.e. control) as to what is getting copied since you can hide unused columns and those won't be materialized in the extract. Or, you could pre-aggregate your data for even faster performance and smaller size.
Check these links out if you haven't already:
p.s. attaching two versions of same workbook that's connected to Access - one's 'live', another is extract-based.