An error occurred copying some or all of the selected files.

When you try to upload a file to a document library in SharePoint site or you connect to the document library by using Web folders. When you try to copy a file to the document library then you receive the following error message:

An error occurred copying some or all of the selected files. OR

The file or folder name "Library/Filename" contains characters that are not permitted. Please use a different name

This issue occurs because of the following reasons:

• The file name contains one or more of the following characters:

                ~ # % & * { } | \ : " < > ? /

• The file name contains one or more leading spaces. That is, the file name starts with one or more spaces.
• The file name contains consecutive periods.
• The file name contains a leading period.
• The file name contains a trailing period. That is, the file name ends with a period.

Resolution:

Remove the characters that are not supported from the file name. For example, if the filename contains a “&” character then please remove it and then try to upload.

References:

1.       http://www.microsoft.com/downloads/details.aspx?FamilyID=a637eff6-8224-4b19-a6a4-3e33fa13d230&amp;displaylang=en

2.      http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/ea0c9961-ea00-44da-a3cb-ca831f73c043/

3.       http://www.wssdemo.com/Lists/Resources/KB%20Articles.aspx