@
theducks 
But - I used QC to swap FN and LN on my 7000+ book media library (612GB, repeat 612GB) - it took a few seconds. That was on an NTFS compressed, indexed, AV active, 2TB, SATA 2, drive, on a 6GB i5.
The same library takes about 2.5 hours to backup to an external USB 3.0 drive (which is faster than the internal SATA2 - same disks, 2TB WD Caviar Black).
Why the difference - the renaming, moving & deleting is done within the NTFS Master File Table (MFT), which is preallocated (and usually contiguous) space, and it operates like a database, in that 'records' don't have to be written to sector boundaries.
BR