I just bought QNAP TS220 and have few basic questions (I have searched the forum earlier. I am not PC savvy)). My main PC is win 7, plus one in Win 8 and another one with XP, and a smart TV. I am running the latest 4.xx firmware version and the NAS is connected to Linksys X2000.

My very basic questions are:
1. Does the NAS needs to be power on 24/7?
2. How do I know if the NAS is running a realtime behind-the-scene back-up? I have been searching for this but failed to find any related info. My main objective is automatic always-on back-up.
3. What is the best way to import folders from the PC to the NAS ( I tried copy the entire folder, and used the USB one touch but end up at 'jalan mati')?
4. How to set-up the security? I read that the security can be based on IP address but I am not sure how this may affect mobile/internet computing.

I know nut about NAS and so far running tons of problem in configuration of it. I have not found a model specific or instructions that are precise for dummy like me. Any references are very appreciated

Sorry for asking so many questions.

still on the painful process of trial and error on my QNAP TS220. The 'technical service' by the distributor is not that helpful thought friendly. Pls allow me to shot some basic questions.
1) In order to have remote access (access PC data from out-of-home), I need a DDNS account - Yes/No? If yes, I need to pay for DDNS service thought there may still be some that are free - Yes/No, care to explain further?
2) I have multiple pc, what is the best way to back-up to NAS? I am using the NetBak Replicator but it takes 'days'.
3) For multiple Pc back-up, do I need to create a different back-up folders in the NAS.

Thanks thanks thanks