To save data to internal or external hard drives, USB sticks, SD cards and other re-writable media always has one big disadvantage: No user uses the same path and later he finds out that a folder he once created for security backups was used to change files while the content of an original source folder was not modified anymore.

Others copy documents to a USB stick, make changes to the file and forget to overwrite it later on their local computer.

Or they save a file on a network drive to allow other users to make changes but do not remind themselves to update the file for their own local use before they edit the data again. 1-abc.net Synchronizer is able to compare folders, detecting new files as well as modified ones and always saves the latest versions to both folders.