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ReadyFree editionFiles & transfer

Copy Engine

Unbuffered, journaled, verified copying that survives disconnects and tells the truth about progress.

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The problem

robocopy has no verification and no GUI. TeraCopy verifies but can read back from the cache. FastCopy cannot pause. Explorer stalls at 99 % because it counts cached writes.

Features

  • Unbuffered overlapped I/O with aligned buffers and per-device queue depth
  • Verification reads from the media, not the cache
  • Journal on the destination, so a yanked USB cable resumes where it stopped
  • ReFS block clone when source and target share a volume
  • Alternate data streams, ACLs, timestamps, long paths, error isolation per file
  • ETA from bytes physically written, smoothed, never 'calculating…'

Who it is for

Admin

Moving 2 TB of VMs to a new NAS

Overnight verified copy; a network blip at 3 a.m. resumed automatically and the morning report shows every hash.

Photographer

Offloading camera cards

Copies to two drives at once; the verified hashes prove the card can be formatted.

Developer

Shared ReFS lab volume

A copy of a 100 GB VHDX finishes instantly through block clone.

Benefits

  1. Copies that are proven correct, not assumed
  2. Resume after a yanked cable, a sleep or a reboot
  3. Honest progress and ETA, never stuck at 99 %

Built to be trusted

  • Journal committed per block
  • Hash verified per file before the source is considered done
  • Pause, resume and cancel at any time, resume after reboot

Good to know

Shipped as the foundation of clone, archive and USB copy. The general-purpose Explorer-replacement UI is planned for a later release.

Under the hood

For technical readers
  • HiveCode.CopyEngine: FILE_FLAG_NO_BUFFERING, OVERLAPPED, WRITE_THROUGH on removable media
  • FSCTL_DUPLICATE_EXTENTS_TO_FILE
  • BackupRead for streams and ACLs; BLAKE3 and xxHash3
Related products

Works well with

Coming SoonPro edition

Verify & Bit-rot Guard

Files & transfer

Hash manifests with scheduled re-verification and Reed-Solomon recovery blocks that repair silent corruption.

Coming SoonPro edition

Sync & Mirror

Files & transfer

Change-journal driven sync that knows what changed in seconds and never deletes without a preview.

ReadyFree edition

USB Lab

Disks & media

Counterfeit detection, surface scan, benchmark, verified secure erase and formatting for USB and SD media.

Ask us about Copy Engine

Copy Engine is ready today. Contact our team and we will help you get started.

Contact us