Thanks for your post! TestRail wouldn’t store a temporary copy or save a draft while creating/editing a test case, and you would just need to be sure to save the case to preserve any details. If multiple users are editing a test case at the same time, and one of the users saved their changes, the other would also receive a notification when attempting to make their save as a soft locking mechanism to ensure that those types of changes aren’t overridden. That said, we’re happy to look into adding a draft save feature to test case (and other entity) editing in a future update to TestRail. Hope this helps!