Problem with the connection from shared network storage to portable computer

I recently acquired a branded shared network storage device. Initially, it’s sharing functions with my digital recorders worked fine but now it would not. Worse is, that it can’t even establish connection to a portable computer.
I have a networking device and a switch. It will connect to this machine through the connecting devices that I mentioned but is still not a recognize connection.
I would like to ask if the size of the hard drive matter? My computer’s hard drive has a capacity of 2TB, could this be a factor that contributed to this problem?
Thank you!
