Two copies, different jobs.

A protected copy stays in Vault on your backend — the signed, guarded original. A working copy lives in Library after checkout — the everyday draft. Keeping them separate is like keeping the museum print in the vault while you sketch on a desk copy.

Use a protected copy for material that should stay behind Vault. Read it on demand, review activity, archive it, restore it, or delete it when you're sure.

Use a working copy for ordinary editing in Library. The working copy is where you change text, organize files, and build new versions without changing the protected original.