We heard your feedback.
You can now see which Spaces a card has been saved to, both on desktop and mobile. Just click the ○ icon within an open card.
We hope this sets your mind at ease, knowing everything is right where you left it.
And a reminder: Not every card needs to go in a Space. If it's not part of a special project or focus, let it float around unattached in your mind without worry. You can always find it later with a quick search.
We have more updates coming soon to make Spaces more convenient to use. In the meantime, take care of your mind.