Everything was working awesome with 2010.
I recently upgraded to 2012 (major mistake).
Trying to backup Lacie NAS servers, I was able to add the file server but when I create a backup job at the selection of files option I get the following error "fail to browse 'servername\sharename'. A communications failure has occured.".
Like I said this was working wonderful with 2010, from the Backup Server I can access the files via windows explorer, I am useing my administrative account for everything.
for any help.. I may have to ditch this 2012 and revert back to 2010 or something else.
...BE 2012 R2/SP2 (whatever!) is going into Beta at the end of May, but that's still 7 weeks or so off. If your backups aren't working, revert back to BE 2010.
Sign up for the Beta, evaluate it and make sure it works with your environment before upgrading again.
If this was working well with BE 2010 you should have the correct permissions set on the NAS box already. Have you reconfirmed the logon account you are using to add and authenticate to the NAS box. Additionally, if the BESA (BE Service Account) is different from this account, could you grant/reconfirm those permissions as well.
The error says - fail to browse 'servername\sharename
Are you adding the file server using "servername\sharename" ? Instead, try using IP address.
Then I would suggest you to open a Support Ticket and have someone look over the debugs during this process. I am sure, it will be of help.