I have setup a home/office network with the PCs in my house and the office. My problem now is which computer should I put the company data file.

1. The computer in my bedroom is ON 24/7, which I think is the best candidate to host the company file. But whenever I'll go on a trip, I always turn OFF this PC and I lock the door of the room.

2. The office have 2 PCs, one is used by my wife but is seldomly turned ON, so this PC can't be used to host the file.

3. The other computer is for the secretary. This computer is turned ON when the secretary arrives and turned OFF when she leaves. This is a very old computer that I used for more than 6yrs already before I transferred it to the office. So I'm not sure if the file will be safe in this computer.

4. Should I add another computer to the office to act as a dedicated server to host the file?

I want the PC hosting the file to be ON 24/7 so I can access it anytime, even at home in my room. So which PC should host the company file?