Okay, thanks! I read some things from this file before and the thing I can't believe is the part where they say that to share files it the file has to be open and running on a computer with filemaker. Is this really the only option? And why is this?
It is possible to access the files via OS file sharing, like any other file. It is also likely that you will corrupt the files if you do so. Best practice is to turn off OS File Sharing entirely on the FileMaker host machine; or at the very least protect the FileMaker files from OS sharing. The phrase "share files", when talking about FileMaker, can only be used in the most general sense.
FileMaker technology is not so much "sharing" as "hosting", ie., server-client, with either FileMaker Pro or FileMaker Server as the host; the client can be either FileMaker Pro or a web browser.
I take it that by sharing you mean :
When Mr A. in the studio enters data, this new data is visible by Mr B in the studio and also Mr C at home and vice versa ?
All 4 can add / edit the data which is stored on the 'host system'
If so, then yes, it needs to open and as Fenton stated, one system becomes the Host of this database, all others become clients.
If the data is only updated (and not very regularly) by one person on one machine, then you can save / send copies of the fp7 files as and when required to the others for viewing purposes, but I doubt this is what you mean.
These files will of course need to be opened in FileMaker, or initially packaged into a runtime (using FMP Advanced)