Hi,
I know this will sound a little prissy, but read the manual.
Please, at least try to understand for yourself before asking others for help.
The less you know to start with, the harder it is to help you.
As a starting point: SME creates shared directories called Information Bays (IBAYS). They can be for whatever you want them to be. When you create a user on the SME, there is an ibay for that user's home directory......log on at a Windows PC as the same user/password and you can map that SME ibay using Explorer and assign it a drive letter. From the command line it would be something like:
net use z: \\smeserver\fred (assuming fred is the username)
BUT, the wonderful thing with SME is, you can create public ibays, with (almost) whatever names you like , and allow a single user acccess, or a group, or everyone - and it can be read-only, or read/write. They can be simple files stores or websites, ftp repositories and so on.
Do some reading then think about your questions again. If you state them clearly, and give as much detail as you can, someone will quickly come to your help.
Cheers
Ian