Using flash drive and SecureAccess for off-site backup

I’m trying to use the flash drive as off-site backup for sensitive data.  Setting up SecureAccess and copying the files that need to be backed up was no problem.  The question is, is there an easy way to refresh the backed up files? Do I have to copy and paste the directories every time or is there a simple way (that I can teach less tech savvy users) to initiate the back up?