Remote File Synching - How to?

I run a small Soho office and have purchased this Qnap TS-509 Pro Nas. It runs great as a file server and holds over 4 TB of data in over 500.000 files.

My biggest nightmare is of course that my house sets fire and I lose everything. So I would like to synchronise it every night with a device I set up in the external Datacenter where I have my own cabinet.

I have tried setting it up with these4 Lacie Bigger Disks of 2 TB each. However when I tried to synch with Ipswitch WS_FTP the connection is always lost somewhere during the night or the program crashes due to the big nr. of files, so very unreliable. The same happened when I used Second Copy.

I then tried the same thing with this"old" Eurostar NAS. Same problem.

I was told that I should use Rsync because that only transfers the differences. I checked the hardware and found out that only my current NAS at home (Qnap) runs Rsync while the Eurostor uses Nsync and the Lacies are running the windows OS.

I am by no means a real "techy", but I have friends who can help to reinstall tings or set it up the correct way. If only I knew what to do? My best guess would be to reinstall the 4 Lacies with Linux and put Rsync on them? or am I completely wrong.

What do you guys think?
Thanks a lot,
Peter

just so you are aware, dont use the current version 2.0 of synctoy for backing up to a nas system, i have read on their forums that people are seeing a lot of corruption of jpgs and avis,

direct to an external drive appears unaffected.

also i dont think synctoy has ftp capabilities, although if your machine can 'see' the destination folder via mapping it might work, but test it with v1.4 for now.