If you add some details about what kind of network you are looking to have, you might get some better results. Some things you might post are:
What size of network are you planning on having?
Other than backups and filesharing, what else will you use the network for?
Do you have a budget in mind for the system?
Will you be utilizing switches and routers for connectivity?
A server purchase can be a mild task, or it can be very overwhelming...depeding on what you are doing. Have a great day!
Thanks for your reply. Currently, our office is using IPVPN so i guess for connectivity wise there's not much of a issue. Currently, our office main issue is to backup every individual notebooks(wireless connection) and desktop(cable connection) in case there's a power failure or computer HDD crash and filesharing. Actually, I am not so familar what a server can do as my computer knowledge is only that little. Budget wise, i guess around S$6k to S$10k. But actually I am thinking is there something which is much lower than this budget? At first, I am thinking of using a NAS system but thinking of the future, it only have little function, therefore decided to have a server. Hopefully, you can advise me more.