Importing Access data from Dropbox

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C#

MS-Access

I want to import some data to a datatable from an Access database table. When the file is stored locally, this works fine :-

string connString =
                "Provider=Microsoft.ACE.OLEDB.12.0;data source=C:\\database.accdb";

However, when the file is stored on Dropbox, this doesn't work :-

string connString =
                "Provider=Microsoft.ACE.OLEDB.12.0;data source=https://www.dropbox.com/sharedurl/BillingFileConverterV6.accdb";

and I get a "Not a valid file name" error.

Could someone let me know what I need to change?

Thanks in advance.