In 2008 the limit is 10GB
>>>My understanding is that for single user Express is free and would do the job? after that it's Workgroup? Is that OK for up to 5 users?
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>The free version will probably work for you, if your DB stays under the 4GB limit.
>Check the MS web site for other limitations.
>I got started with the Enterprise version (pricey) and never really looked at the free version because of that limitation, but it's probably a good choice in many cases.