Migrate Channels to a New Workspace
When you want to move documents in bulk from one Slite workspace to another, you can export and re-import your content. But before doing this, have a look at this method which could save you some time.
Make your channel public (you'll make it private again or delete it once the migration is done).
Select the option to show the "duplication" button
Open the channel's public link and click on "duplicate". You'll then have to choose the new Slite workspace you want to use as the destination.
Don't forget to turn the initial channel that you made public back to private or delete it 
Adapt the content as you wish