How to move a PostgresSQL/ PostGIS to another drive

Firstly I'd like to say I know little about databases (GIS background) and I might have bluffed it all so far. But we wanted to set up a database for use with QGIS. My understanding was that the PostgresSQL made the server and PostGIS add on made the databases on that server. I'm not operating with a network or dedicated servers I have a C drive and a Q drive. We installed PostgresSQL (servers?) and PostGIS (database?) on my Q drive where I created and manipulated all my data. But now we want to move it all to a portable drive (E) so that others can access the database by pluging into the drive is this possible? and if so how does someone who does not understand databases nor SQL do it? Cheers matthew