Toolkit only allows one Backup plan per computer per drive, there may be instances where Backup options are grayed out and Toolkit states: “Unable to create a Backup plan. Delete a plan from another user on a connected drive.”
Some Windows machines may have multiple user accounts, and if you have created a Toolkit backup on one user's account then you will not be able to create a backup with Toolkit on any other user. Situations such as these will result in the above message. If backing up a second user on your Windows machine is needed, please try the options below to resolve the issue.
Options for backing up a secondary user:
If you are not trying to back up a secondary user but are still seeing this message, try renaming the Toolkit folder on the external drive to Toolkit_Old. This should allow Toolkit to create a new backup. To prevent the drive from filling up, consider deleting the old Toolkit folder once you confirm you no longer need the data stored within the old backup.