Accessing network resources remotely

Good day everyone,

I want to thank all those who've had provided direction to some of my other posts.  I have another question but not sure if this is the correct forum to ask.  If there is another forum where this may be posted please let me know.

My business users are off-site more often than not.  They are active CRM on Demand users that track their opportunities but want to start posting files such as ppt, docs, pdfs, emails to those records.  While I know they can add attachments, I've advised them not to for a couple of reasons such as saving spacing and information control.