>>You cannot really backup live (open tables)
>
>I never even tought of that ;
>
>However, I am able to copy entire database to local PC folder at any time
>with all my users logged in.
>Does it mean MS Backup is more demanding as to have exclusive grip
>on data then ordinary copy call ?
>
>I am doing that from time when I need to troubleshot something on a snapshot of live data. Theoretically, that means that I could schedule (x)copying of entire set of folders to alternative location and then then perform backup from there even if my users were loged 24/7 ?

Well, a DBF is a Windows file, not a real database. So if there is an Exclusive lock it is reflected in Windows OS, which may prevent a backup program for working with that file.