Yes, the file name should be with some meaning. If you want to upload measurement documents for 28-07-2013, then you can maintain the file name as 28-07-2013 & make the program to read the system date and compare that with file name.
Else make one common file name as Measurement Documents & keep removing old data by putting new data which needs to be uploaded.
And, location should be unique either Desktop or some unique place where your Background program should look for the file.