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Legal · v2.0.0 · effective 2026-10-29

Third-Party Notices

Storage Studio · Techtonic Systems Media and Research LLC

Storage Studio, Storage Studio Bridge and our website include open-source software written by others. This page credits them and names the licence each is used under. Each component is licensed to you directly under its own licence; nothing in our Terms of Service limits the rights those licences give you.

What changed in this version

Version 2.0.0 (29 October 2026):

  • Corrects rsync: it is bundled with the app, not required separately.
  • Adds the backup engine (Kopia), the Argon2 password-hashing code, the PDF viewer on our website (pdf.js) and the components of Storage Studio Bridge.
  • Adds where to get source code for the components whose licences ask for it.

In the Storage Studio app for macOS

rclone — moves files to and from cloud accounts. Bundled and run as a separate program, unmodified.

  • Licence: MIT. Copyright (C) 2012 by Nick Craig-Wood.
  • Source: rclone.org.

GNU rsync (version 3.x) — copies folders between drives. Bundled and run as a separate program, unmodified.

  • Licence: GNU General Public License, version 3 or later (GPL-3.0-or-later). Copyright (C) 1996–2025 by Andrew Tridgell, Wayne Davison, and others.
  • Full licence text: gnu.org/licenses/gpl-3.0.txt.
  • Source: the complete source code for the version we ship is available from rsync.samba.org. We will also send it to anyone who asks, at no charge beyond the cost of sending it, for at least three years after we last ship that version — email <legal@storagestudio.us>.

Kopia — the engine behind Data Backup. Bundled and run as a separate program, unmodified.

Argon2 reference implementation (including its BLAKE2b code) — derives keys from passwords and recovery kits. Included as source code in the app.

  • Licence: Creative Commons CC0 1.0 Universal, or Apache License 2.0, at your option; we use it under CC0 1.0. Copyright 2015 Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves.
  • Source: github.com/P-H-C/phc-winner-argon2.

Apple frameworks and macOS tools — the app uses Apple's frameworks (including Foundation, AppKit, SwiftUI, CryptoKit, Natural Language and, where available, Apple Intelligence) and tools that are part of macOS (including SQLite). They are provided by Apple under the macOS Software License Agreement.

In Storage Studio Bridge

Bridge for Windows, macOS, Linux and Android is built with these open-source components:

  • go-libp2p, go-libp2p-kad-dht and go-multiaddr — peer-to-peer networking. Licence: MIT. Copyright Protocol Labs, Inc. and contributors. Source: github.com/libp2p.
  • go-yamux — connection multiplexing. Licence: Mozilla Public License 2.0 (MPL-2.0). The source code of this component is available at github.com/libp2p/go-yamux; we have not modified it.
  • pkg/sftp — file sharing between devices. Licence: BSD 2-Clause. Copyright (c) 2013, Dave Cheney.
  • Go extended libraries (golang.org/x/net, x/sys, x/image) and the Go standard library. Licence: BSD 3-Clause. Copyright The Go Authors.
  • webview_go — the window on macOS and Linux. Licence: MIT. Copyright the webview authors.
  • go-webview2 — the window on Windows. Licence: MIT. Copyright the go-webview2 authors.
  • lxn/win — Windows system calls. Licence: BSD 3-Clause. Copyright The Walk Authors.
  • fyne.io/systray — the menu-bar and tray icon on Linux. Licence: Apache License 2.0. Copyright the systray authors.
  • AndroidX libraries — the Android app. Licence: Apache License 2.0. Copyright The Android Open Source Project.

These components in turn include further open-source modules under the MIT, BSD, ISC, Apache 2.0 and MPL 2.0 licences. The complete list of the modules and their licence texts is available on request from legal@storagestudio.us.

On Windows, Bridge uses Microsoft Edge WebView2, and on macOS, Apple's WebKit, both provided with the operating system.

On our website

  • pdf.js (version 3.11.174) — shows PDF files in the Delta Drive viewer. Licence: Apache License 2.0. Copyright Mozilla Foundation and contributors. Source: github.com/mozilla/pdf.js.

Licence texts

All of these licences provide their software "as is", without warranty.

Trademarks

macOS, Mac, Apple, Apple Intelligence and Finder are trademarks of Apple Inc. Windows and WebView2 are trademarks of Microsoft Corporation. Android is a trademark of Google LLC. Stripe is a trademark of Stripe, Inc. Cloudflare is a trademark of Cloudflare, Inc. All other trademarks belong to their owners.

Something missing?

If you think a component should be listed here and isn't, email <legal@storagestudio.us> and we will correct this page and the app.