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Imported ZIP, PCG, KSC and sample files stay read-only. Every edit happens in an independent working copy, and Undo/Redo can reverse it. Keep your own backup of the original files anyway — browser project backups contain metadata, not your binary files.

Upload one SET ZIP to each panel in SET Manager. If a ZIP contains several PCGs, choose the one you mean explicitly — the app never guesses. Uploading a SET with the same name again offers Keep existing, Import as separate instance, or Replace (Replace removes the old import, its working copies and undo history — never files on your disk).

Cancel leaves the current SET intact.

Select sounds in the source panel (Ctrl/Cmd for several, Shift for a range), then Copy and Paste into the destination working copy. The preview lists every dependency that travels with your pick — Programs inside Combinations, Drum Track Programs, Wave Sequences and Drum Kits — and every destination slot that would be replaced.

Apply stays disabled while anything is unresolved or blocked. A ready preview means the software checks passed; it is not a promise the keyboard will accept the result.

A slot counts as free only when its bytes exactly match a keyboard-initialized record — never because of its name. A sound renamed "Init Combi" still counts as a real sound. Deleting a Program or Combination restores the verified blank record, checks that nothing still references it, and can be undone.

Space Manager shows who uses every slot, including inactive and unresolved links, which still protect it.

User samples may only be reused when the destination's own sample files are byte-identical to the source's — nothing is rewritten. The Sample Dependency Report in the transfer preview shows every needed multisample, its file, and whether the payload is present, missing, or unidentifiable.

Copying sample collections between SETs, merging KSC files and renumbering sample references remain blocked until keyboard-generated evidence proves how the KRONOS writes them.

Build re-checks the actual copied bytes and every reference independently before creating a new test PCG — no download is offered on failure. SET ZIP export keeps every unrelated file of the destination archive untouched, verifies checksums, and re-imports the result before you can download it. Cancelling a Build or export withholds all partial output.

An unfinished transfer preview is saved as intent only — never as executable output. Reattach the unchanged source and destination ZIPs and choose Resume preview; their identities are verified and changed SETs are rejected. Nothing ever applies itself automatically.

If you see a NOT SAVED warning, download a project backup before reloading. Workspace read failures block all writes until Retry succeeds — corrupted saved data is recovered, never silently replaced.

Sample copying and KSC merging, Combination Set List writing, creating new banks, references above index 255, and EXi/KARMA/user Drum Track writes stay disabled until there is verified evidence for them. The app refuses rather than guessing.

Use a full keyboard backup and a disposable destination SET. Load the exported test SET, check names, playback and error messages, and stop on any warning. Share the keyboard's OS version and before/after files when reporting results — that evidence is what unlocks the blocked features above.