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title: “Kopia Tutorial: A Fast and Efficient Backup Tool” description: “Kopia is an open-source backup tool supporting incremental backups, snapshots, compression, and encryption, capable of backing up to local disks, NAS, cloud, and other storage locations.” date: 2026-05-13T16:11:25.527Z category: 系统工具 tags:

• Kopia
• Backup Tool
• Incremental Backup
• Data Backup
• Open-Source Backup keywords:
• Kopia
• Backup Tool
• Incremental Backup
• Data Backup
• Open-Source Backup

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Kopia: Automatically Backups Up File Versions You’ve Forgotten About — a Lifesaver When It Matters

One-sentence solution: Never properly backed up important files, or found your backup method was wrong? Kopia automatically creates incremental snapshots so you can revert to any historical version at any time.

People who’ve never lost files don’t understand the importance of backups. Until one day — you accidentally delete a three-month research paper, your hard drive suddenly fails, or ransomware encrypts all your documents — only then do you realize how crucial backups are.

Traditional backup methods are either too cumbersome (manual copy-paste) or too expensive (buying a NAS or cloud subscription). Kopia finds a balance between the two.

What Is Kopia?

Kopia is an open-source backup tool. It uses snapshot technology — full backup on the first run, then only backing up changed portions (incremental backup). All data is compressed and encrypted, and can be stored on local disks, NAS, cloud storage (S3, GCS, Azure Blob), or any WebDAV server.

The problem it solves: Providing a fast, encrypted, automatic backup solution with support for reverting to any historical version.

Core Features

• Incremental Snapshots: First run is full backup, subsequent runs only backup changed data blocks
• Client-Side Encryption: Automatically encrypted before upload — the provider can’t see your data
• Compressed Storage: Reduces storage space usage
• Multiple Storage Backends: Local disk, NAS, S3, Google Cloud, Azure, etc.
• Snapshot Browsing: Browse historical versions like a file manager
• Automatic Cleanup: Clean up expired snapshots based on policy
• Command Line + GUI: Two operation modes

Comparison with Similar Tools

Dimension	Kopia	Duplicati	Veeam Agent
Open Source	✅ GPL	✅ LGPL	❌ Limited free version
Incremental Backup	✅ Excellent	✅	✅
Client-Side Encryption	✅ AES-256	✅	✅
Cloud Storage Support	S3/GCS/Azure/WebDAV	S3/OneDrive/GDrive	Limited
Snapshot Browsing	✅ GUI	❌ Command line	❌
Performance	Fast	Slower	Fast

Download

• Official Site: https://kopia.io/
• GitHub Releases: https://github.com/kopia/kopia/releases
  • Windows users download KopiaUI-*-Setup.exe (GUI version)

Note: Recommended to download KopiaUI version — after installation, there’s a system tray icon for right-click operations. The command-line version is for advanced users. Kopia is open-source and completely free.

Quick Start

1. Download and install KopiaUI
2. Launch and click “Create New Repository”
3. Choose storage location (local folder / NAS path / cloud storage)
4. Set encryption password (remember it — you can’t recover data without it)
5. After creating the repository, add directories to backup
6. Click “Snapshot Now” for immediate backup
7. Set auto-backup policy (recommended daily)
8. To restore, open “Snapshots,” browse to the needed version, click “Restore”