The meaning of this message: cannot create or replace update: access is denied m

What is the procedure you are using to do the backup?

the procedure is from tools menu, click options>maintenance tab>store folder then i selected a location then copy it and pasted it in the box after i clicked on the start button and run,
then i went to the edit menu clicked on select all and then copied and pasted in the new folder i created on my desk top, but it is at this point that i get the error message i sent earlier

was outlook open when you tried to copy the file? Can you try it again with outlook closed?
Also try copying the file to another location on your internal HD. Try creating a basic text file on the external HD. Isolate the problem.

outlook was closed when i got to the point where i had to paste the copied mails.
as for coping it to another location i am sort of scared of doing that because the mails wen not properly copied disappears and my system has loads of information for the company which can required at anytime.
i have a feeling my disk or something of that sort is full because if i try sending mails with attachments it keeps miss delivering and the same is happening with the receiving of mails.
pls assist cos dis is slowing down my pace of productivity and my boss is scream heavens,
thank you.

Please try my troubleshooting tips from before. Can you copy ANYTHING to the external HD from the internal?
What is the size of the pst file, or folder you are trying to copy?