You mentioned that you don't have the disk space to migrate the whole VM.
Question: Do you have ~2TB free disk space on another datastore? This would allow you to migrate/clone e.g. "SRVFILERVECTRA_2" to another location, and free up sufficient disk space to then consolidate the VM's snapshots. Depending on the resulting sizes, and the free disk space, you may even be able to migrate the previously moved virtual disk back to its current location.
André