I am trying to use Acronis True Image Server v9.1 Build 3920 to backup a directory on our server. Our Server runs Windows 2000 Advanced Server SP-4 and is a Domain Controller. I am backing up to an external USB harddrive. The backup operation runs for a while (sometimes minutes, sometimes hours) then fails, with the following error message ... E00040001: Failed to backup file or folder <file path>. Error reading the file (0x40001) Tag = 0x61F1883FE50B0AF4 (0x1003EB) Tag = 0x14181C22EF45AC01 The file at which it fails is always different. I have run a chkdsk on the source and destination drives and no bad sectors were found. I would greatly appreciate some advise.