Can I move files between hot and cold storage, or is it one-way?

Think of cold as the archive destination — files go there for long-term keeping, and the tier deliberately has no AI or guest features, so it's not built as a round-trip staging area. If a client comes back a year later wanting their gallery live again, you'd be setting that up in hot storage. For genuinely huge migrations, the support team has helped photographers move serious volumes before, so don't suffer through a 400 GB shuffle alone if you hit a wall.