KB2236: Manually moving backup files to ... - Veeam Software
https://www.veeam.com/kb223609.02.2017 · Evacuate the extent. Veeam will redistribute the backup files to other extents in the SOBR. If you did not map the original job in step 4, do so now. If redistribution of files is not desired or necessary, you can simply copy the folder containing VBM and backup files to an existing extent. Rename both path and VBM to ensure import, and re-scan.