CopyBranch

One folder in. A stack of ready USB drives out. Erased, formatted, cloned, and ejected — all at the same time.

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Version 1.0  ·  macOS 14+  ·  Apple Silicon + Intel  ·  3.4 MB

Features

Everything CopyBranch does for you.

⚡

Clone to many drives at once

One source folder fans out to every selected USB drive simultaneously, streamed in high-throughput 32 MB chunks.

🧹

Erase + format first

Each target is wiped, re-partitioned (GPT), and formatted in your choice of ExFAT, MS-DOS (FAT32), APFS, or Mac OS Extended — then the fresh volume is verified before any file lands on it.

🧭

Six-step wizard, one window

Source, label, drives, review, copying, finished — a single dark window with a step rail, Back/Continue, and a live terminal-style log.

📏

Fit-check before erasing

Your payload is measured the moment you pick it and weighed against the smallest selected drive. Too big? Start stays off.

⏱️

Speed + time remaining

A live stats strip with MB/s throughput, a bold time-remaining readout, per-drive progress bars, and a color-coded log narrating the whole run.

🔒

Guards against disasters

Internal disks are hidden, drives 128 GB and larger get a red warning to double-check, and the payload is re-measured against live drive sizes before anything is erased.

🛑

Cancel that actually cancels

Stops in-flight files within one chunk instead of finishing them, and sweeps up partial files. Drives stay mounted for inspection.

🔌

Eject you can trust

Caches flushed, then every drive ejected with retries and an unmount fallback — each one reports back so you know what's safe to pull.

🖥️

Native macOS app

Swift + SwiftUI, no runtimes or dependencies. A 3.4 MB download that drags straight into Applications.

How a run goes

Six steps, one window, zero guesswork.

  1. Source folderDrop a folder or browse to it. CopyBranch measures it on the spot, hidden files skipped.
  2. Volume label + filesystemThe name stamped on every drive (live preview), plus your format: ExFAT, FAT32, APFS, or HFS+.
  3. Target drivesTap the USB drives. Each shows size and connection; 128 GB+ drives show a red warning instead of a lock.
  4. Review + startThe whole plan on one screen, one destructive confirmation, then go.
  5. CopyingErase, format, remount, verify, clone, sync, eject — with speed, ETA, per-drive bars, log, and instant cancel.
  6. FinishedEjected and safe to remove, full log attached, one click to start another batch.

Get CopyBranch 1.0

Free download, ready in under a minute.

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  1. Open the .dmg and drag CopyBranch.app into Applications.
  2. First launch: right-click → Open (ad-hoc signed, so Gatekeeper asks once).
  3. Requires macOS 14+, Apple Silicon or Intel.