I wish to move some of my favorites into sets, but I don't know if there even is a way to do it at once. Also would like to remove these posts after.
Topic: How can I move posts to sets in bulk?
Posted under e621 Tools and Applications
2 ways to do this as far as I know.
First -
1. Go to your favourites. At the left side of the screen below the search bar, there should be a "Mode" scrolldown menu.
2. Change the mode from "View" to "add to set"
3. Select the desired set.
4. Add what you want
Second -
1. Navigate to your set. At the top of the screen there should be various options like edit, delete, maintainers,ect
2. select "edit posts"
3. Add the post IDs you want to put in the set. Click update afterwards.