Bookmarks
What a saved post is here.
A bookmark is a captured record: its text, its author, its media and the lists it was filed under, held privately until the owner publishes it.
Capture
Captured, not copied.
A capture keeps the post as it was observed, so a record opened a year later still shows what was there rather than what the page says now.
Private
Private until published.
The store belongs to whoever captured it. A record reaches a canvas only when a publish motion names it, and withdrawing it is the same motion in reverse.
Filed
Filed under a list you name.
Lists are the owner's own nouns, not a taxonomy the product ships. A post no list has claimed sits in the unsorted bucket instead of disappearing.