Netger R9000 how long to to backup using ReadyShare Vault? It's been running for >20 hours!

> I guess it's possibly backing up somewhere approaching 1TB of data.
> [...]

   That's not a small amount.

> [...] I'd like to know if this sort of time duration is normal [...]

   It may be.  You need to consider that you're dealing with the actual
source storage device and the backup software on the Windows system, the
network hardware, the file sharing software running on the
(sub-amazing?) CPU in the router, the USB interface speed, and the
actual destination storage device attached to the router. Many of those
considerations vanish with a destination storage device which is
directly connected to the source system. Without a much more detailed
analysis, I would not bet that the router's USB interface is your
bottleneck.

> [...] and if subsequent back-ups are quicker i.e. is it one of these
> systems where subsequent backups only change files that have been
> changed since the last time?

   Almost certainly.

> [...] NAS [...]

   I also wouldn't bet that a "true" NAS system would greatly improve
your times.  My NAS experience is limited to small Seagate devices
(NAS 220, and similar -- SATA disks, gigabit Ethernet), and I haven't
done any large transfers to one lately, but I've spent at least a whole
day waiting for an initial (Mac Time Machine) backup (smaller than 1TB)
to finish.  Running the experiment would be much more reliable than any
advice you're likely to get here.

   I _would_ expect a real NAS gizmo to suffer from fewer firmware bugs
than the slapped-together mess of freeware which you'll find for file
sharing on a Netgear router.  However, the primary advantage of a real
NAS gizmo is RAID.  When your single USB-connected disk fails, you
typically lose all the data on it.  When a disk fails in a RAID system,
you don't.