When attempting to start an edit session for a shapefile stored on a network drive ArcMap, the following error message may occur:
"Could not edit the data in the folder or database you selected. Check to see if you have the appropriate permissions."
This is a known issue. This message may be encountered when attempting to access UNIX drives via Samba, or Windows NT drives when the user does not have full control.
In ArcGIS 8.1 Service Pack 1, you can copy the shapefile to a local directory, edit it, and replace it on the network drive.