When setting up Seagate Secure there may be times when Toolkit states that the SID is incorrect. This article covers how to troubleshoot the issue.
Try the following if Toolkit is saying that the SID is incorrect:
IMPORTANT: Prior to factory resetting the external drive, make sure that there is no important data on the external drive. Under most circumstances the data on the external drive will be erased and will not be recoverable. Don’t proceed with factory resetting if the data on the external drive can’t be backed up first. Depending on the state of security the data may not be erased, but you should still back up the data before factory resetting the drive. Factory reset will reset the SID regardless of the security state.
To factory reset the drive:
After the reset is complete, try to enable security using the SID.