Hello Lisa,
When tasks are deleted, they are initially marked as "deleted", and then deleted some time later [1].
I strongly recommend exporting as soon as possible, to hopefully retrieve any tasks marked as "deleted" before the Google Tasks server permanently deletes the tasks.
When the [Clear completed] button is pressed, any completed tasks are marked as "hidden" and moved to the [Completed tasks] view [2].
GTB allows all tasks from the Google Tasks server to be retrieved and exported, including tasks that are marked as "deleted" or "hidden".
- Go to https://tasks-backup.appspot.com
- If prompted, click [Authorise] and follow the prompts to allow GTB to retrieve your tasks.
- Ensure that all 3 "Advanced settings" checkboxes are enabled.
- Include completed tasks
- Include deleted tasks
- Include hidden tasks
- Click [Retrieve tasks]
- GTB will retrieve tasks from the Google Tasks server. This may take several minutes if you have many tasks.
- GTB will indicate how many tasks were retrieved from the Google Tasks server
- Choose the desired export format and click on [Export tasks data]
- If you wish to re-import the tasks into another, you will need to export using the "Import/Export CSV" format [3]
- I recommend exporting in several different formats to give you the best possible chance of capturing potentially deleted tasks
- You can also display all the retrieved tasks in a format suitable for printing;
- Ensure that "All tasks" and "Display parentless, invalid and corrupted tasks" are enabled, and all the "Display options" are enabled.
- Click [Display tasks page] to display all tasks
- The top of the page will display the number of completed, incomplete and deleted tasks.
- Any deleted tasks will be displayed as grey text, with
- Deleted - displayed below the deleted task.
[1] Google has recently changed the behaviour of the Google tasks server, so I do not know how long a task is marked as "deleted" before being deleted.
[2] I am not sure if Google still used the "hidden" flag. Completed tasks have a value in the "completed" field.
[3] Though I generally recommend using the "Import/Export GTBak" format, if the tasks are marked as "deleted", you will need to edit the data to clear the "deleted" and/or "completed" and/or "hidden" fields before re-importing.
Please contact me again if you manage to retrieve tasks and need help re-importing.
I hope this helps,
Julie
GTB Developer