I am using Roxio not Nero but it seems like both programs work kind of similar. And your point is valid; the way to find out if there is an issue is to create a test case. And this is what I will do. Thank you.

>I would do a test to make sure (restore a small number of files to another location), but it should not be an issue. If you use a program like Nero to manage copying files and you create a 'project' in Nero to do it, the project must know where those files always are. Nero creates a little note as to the location of the file so the project can find it (metadata). If you move a file, the note is updated so the Nero project can still find the file when you open the project up in Nero. Otherwise, the Nero project would no longer see the file. Those 'notes' are not copied because you are not copying the file to an NTFS system. Also, the cd doesn't need that information.
>
>The real test necessary is to use a project file to create a backup on cd (one where you received that message) and then restore it and ensure it gets restored correctly. I would test with some dummy files. Create a project in Nero, then move a couple of the files around, and then do a copy to cd and restore.
>
>
>>What you are saying is what I understood from the link Sergey sent me. What I would like to know is what exactly caused the message of Stream Loss started to show up recently. I have copied files from my hard drive to CD millions of times but only recently I started getting the message of Stream Loss. I hope this is a small and benign issue and I should not be worried. I copy my files to a CD as a way of a back up. And if I ever have to use this back up to restore the files I hope it won't be an issue.
>>
>>Thank you for your input.
>>
>>>It turns out that the NTFS file system can have several "data streams" (pieces of data) attached to a file. The main "data stream" is what is usually considered the file contents (not sure about the exact terminology here...), but there may be additional pieces of information about the file, of arbitrary size - these would be the alternative data streams. In theory, a file can appear to have zero bytes, or only a few bytes, but hide gigabytes of information in such an alternate data stream.
>>>
>>>>Recently when trying to copy files from a folder I get a message
>>>>
>>>>

>>>>Confirm Stream Loss
>>>>"The file "MYFOLDER" has extra information attached to it that might be lost if continue copying.  
>>>>The contents of the file will not be affected.  Information that might be lost includes:
>>>>:MYFILE.DBF:$DATA
>>>>

>>>>
>>>>Note that DATA is a name of the folder in the MYFOLDERNAME.
>>>>
>>>>Is there anything I can do to fix this problem? Is this really a serious problem?
>>>>
>>>>Thank you in advance for any suggestions.