- Go to the C drive and double-click the 3Shape folder.
- Select the files for the specific date range and drag them onto an external hard drive (or to whatever device you are storing these on).
NOTE: If you drag files from one folder to another folder on the same drive the files will be moved to the other folder.
If you drag files from one folder to another folder on a different drive (like any external drive, or a USB stick) the files will be copied to the other folder.
"Backing up" does not mean moving existing files, it means creating a copy of existing files and putting those copies in a different location than the originals. Be sure you have actually backed up your files--and not just moved them--by checking that the files exist in the both the original location and the backup location.