Why Backup Your Aircraft Mods?

Your collection of aircraft modifications is the result of hours of downloading, configuring, tweaking, and testing. Each mod can contain custom textures, flight dynamics, sounds, panel configurations, and complex scripting that bring a specific aircraft to life in your simulator. When you lose those files through a corrupted download, an aggressive Windows update, a drive failure, or an accidental deletion during a clean install of your flight sim, recovering that exact environment can be nearly impossible. Even if you remember what you had installed, re-downloading and reconfigure everything takes significant time. A backup ensures that you can restore not just the mod files but also the custom settings, liveries, and compatibility adjustments you made. This applies to any platform on AeroSimulations: Microsoft Flight Simulator 2020/2024, Prepar3D v5/v6, X-Plane 12, Flight Simulator X, or DCS World. Treat your mods as valuable data — because they are.

Best Practices for Backing Up

Follow the 3-2-1 Rule

The industry standard for data protection applies directly to aircraft mods. Keep three copies of your mod library: one primary working copy on your main gaming drive, a second copy on a local external drive or a second internal drive, and a third copy off-site. Off-site can mean cloud storage, a drive at a friend’s house, or a NAS in another building. This protects against simultaneous failures: for example, if ransomware encrypts your main drive and the always-connected external drive, the off-site copy remains safe. Cloud services like Backblaze (flat-rate unlimited backup), Google Drive, Dropbox, or OneDrive are convenient options for the off-site copy. Remember that mod folders can be large — a full library of payware aircraft often exceeds 100 GB. Ensure your chosen cloud solution supports large files and provides enough storage.

Automate Your Backups

Manual backups are often forgotten until it is too late. Use backup software to schedule regular, incremental copies of your mod folders. FreeFileSync is a free, open-source tool that can mirror mod files to an external drive with a simple scheduled task. EaseUS Todo Backup Free or Macrium Reflect allow you to create full disk images of your simulator drive — a catch-all that ensures you can restore an entire flight sim installation, including registry entries and add-on managers. For cloud backups, schedule the sync client (e.g., Dropbox desktop app) to always be running. A once-weekly incremental backup is sufficient for most users; if you install or tweak mods daily, consider a nightly differential backup.

Maintain Versioned Backups

When you update a mod, you should be able to roll back if the new version introduces bugs, removes features, or conflicts with other add-ons. A versioned backup system stores multiple snapshots of your mods over time. Some backup software (e.g., Macrium Reflect, Acronis True Image) natively support versioning. For a simple DIY approach, use Git with LFS (Large File Storage) to track your mod folder. Git can handle text-based configuration files well, and LFS extends it to large binary files like textures and aircraft models. Another lightweight method: before installing an update, copy the current mod folder to a Dated directory (e.g., ModBackups/PMDG_737_v_1.0.5_2025_03_01). That way you can revert in minutes.

Verify Backup Integrity

A backup is worthless if it cannot be restored. Periodically, open a few random files from your backup location and compare them with originals using checksums (e.g., using fciv on Windows or md5sum on macOS/Linux). Many backup tools include a verification step at the end of the process. Also perform a test restore of a non-critical mod to ensure the files copy back correctly. If you use cloud storage, download a random file to check that it opens properly. This habit catches silent corruptions early and gives you confidence that your backup strategy works.

Managing Aircraft Mods Effectively

Organise Files with Clear Structure

Your sim’s documents folder can quickly become a chaotic pile of zip archives, subfolders with cryptic names, and leftover installer files. Build a clean, logical hierarchy. For example, create a master folder called Aircraft Mods on a large drive, separate from your operating system. Inside, divide by simulator platform: MSFS2020/, P3Dv5/, X-Plane12/. Within each, subdivide by developer or type: PMDG/, A2A/, Payware/, Freeware/. Name each mod folder with the aircraft name and version number, e.g., PMDG_737-700_v3.1.4. Do not rely on “latest version” — you will forget which version is actually installed. Use a consistent naming convention for readme files and texture folders so you can quickly find what you need. This structure also makes backups faster because you can exclude non-mod files like videos and old zip installers.

Document Everything

Memory is not reliable. Keep a running log of every mod you have installed, including the source URL or purchase email, version number, date of installation, any conflicts you encountered, and tweaks you applied. A simple spreadsheet works: columns for aircraft name, developer, version, installation date, notes. Advanced users can maintain a Markdown document inside each mod folder. Documentation is invaluable when you need to reinstall your sim on a new PC or after a catastrophic failure. It also helps you avoid downloading incompatible mods — if you note that a certain livery caused a crash in X-Plane 12.0.8, you can skip it on an updated version until you verify compatibility.

Test Mods in a Sandbox

Before adding a new mod to your main flight sim environment, test it in a separate installation. On Windows, you can clone your sim folder by copying the entire installation to another drive. Many sims allow a portable install concept (e.g., X-Plane can run from any folder). For MSFS, use the Community folder approach — create a temporary Community folder elsewhere, use the add-on linker tool to point the sim there, and enable only the new mod. This prevents a broken mod from corrupting your carefully tuned configuration. If you do not have space for a full clone, at least remove all other mods temporarily during testing. Once you are satisfied the mod works and does not cause performance drops, install it permanently. This practice saves hours of troubleshooting later.

Update with Caution

When a mod developer releases an update, do not immediately overwrite your current files. First, read the changelog thoroughly — look for breaking changes, deprecated features, or new dependencies. Next, create a backup of the current version either via your versioned backup system or by copying the folder to a dated archive. Then apply the update according to the developer’s instructions. If the update provides an installer, let it run; if it requires manual file replacement, follow step by step. After installation, test the mod in the sim for at least a short flight. If something is wrong, you can quickly delete the updated folder and restore the backup. This method also helps you isolate whether a new bug is from the update or from another mod that changed simultaneously.

Platform-Specific Considerations

Microsoft Flight Simulator 2020/2024

MSFS stores most mods in the Community folder, but some install directly into the game’s official package directories. Always back up both Community and the Official\OneStore or fs-base folders if you have manually modified default files. Use the Addons Linker tool to manage symbolic links — this allows you to keep mods on a separate SSD and easily enable/disable them. When backing up MSFS mods, also include your UserCfg.opt and any custom control profiles in AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache. Cloud saves from MSFS do not include mods, so manual backup is essential.

Prepar3D and FSX

These older sims rely heavily on the SimObjects\Airplanes folder and the Effects, Sound, Texture folders. Many add-ons also install XML files into the ProgramData or AppData directories. Use a tool like P3D Addon Manager to see all add-on locations. For backup, imaging the entire Prepar3D installation drive is safest because add-ons often scatter files across the registry and various folders. If you prefer file-only backups, use a comprehensive list of all add-on paths derived from the Addon Manager or Lorby-SI Addon Organizer. Remember that FSX’s DLL.xml and EXE.xml files may contain needed startup links — include those in your backup.

X-Plane

X-Plane is modular: aircraft go in Aircraft/, custom scenery in Custom Scenery/, plugins in Resources/plugins/, and scripts in FlyWithLua/ or X-Camera/. The Output/preferences/ folder contains key joystick assignments and rendering options. Back up the entire X-Plane folder if possible; the base sim is smaller than MSFS, so a full backup on an external SSD is feasible. For version control, X-Plane users often keep a “clean” copy of the base sim for testing. Use xOrganizer to manage scenery_packs.ini — back up that file separately because it is critical for correct loading order.

DCS World

DCS World stores mods in the Saved Games\DCS.openbeta\ or DCS World\ folders, depending on the mod type. The Scripts/, Mods/aircraft/, and Liveries/ directories are common targets. Use OvGME (a mod manager) to enable/disable mods and keep a clean core. When backing up DCS, do not forget the Config/options.lua and input profiles in Config/Input/. DCS updates often break mods; a backup of your entire Saved Games\DCS.openbeta folder before a major update can save hours of reconfiguration. Also consider using DCS Updater GUI to manage backup snapshots.

Tools and Resources

Backup Software

  • FreeFileSync — open-source, cross-platform, compares folders and syncs efficiently. Ideal for scheduled mirror backups.
  • EaseUS Todo Backup Free — supports file, disk, and system backups with scheduling. Good for beginners.
  • Macrium Reflect — powerful disk imaging with versioning. Best for creating a complete snapshot of your sim drive before major updates.
  • Acronis Cyber Protect Home Office — includes ransomware protection and cloud backup. Premium option.
  • rsync (for Linux/macOS/WSL) — command-line tool for incremental backup of large directories over network.

Cloud Storage and Off-Site Options

  • Backblaze — unlimited personal backup, cheap annual fee, works well for large mod libraries.
  • Google Drive / OneDrive / Dropbox — good for smaller collections (up to a few hundred GB). Use selective sync to avoid filling your local drive.
  • IDrive — supports continuous backup and hybrid local+cloud.

Version Control and Mod Managers

  • Git + Git LFS — track changes in mod folders, revert to any commit. Recommended for advanced users who script their own configuration files.
  • OvGME — simple mod enabler/disabler with backup snapshots for DCS and other sims.
  • JSGME — older but still used for IL-2 and some FSX/P3D mods.
  • Addon Linker — manage MSFS Community folder via symbolic links; also backs up link structure.
  • Lorby-SI Addon Organizer — comprehensive tool for P3D/v5 add-on management and backup.

Community Forums and Guides

  • FlightSim.com — huge mod library and tutorials.
  • AVSIM — active forums, reviews, and user guides on mod management.
  • AeroSimulations — community of modders and pilots, with dedicated threads on backup strategies.

Restoring from Backups

When disaster strikes, stay calm. The restoration process depends on what you backed up. For a full disk image (e.g., Macrium Reflect), boot from rescue media and restore the image to the original drive. This gives you back the entire sim exactly as it was. For file-level backups (e.g., FreeFileSync mirror), copy the backup folder back to the original location. If you use versioned backups (Git or dated folders), navigate to the specific version you want and copy it over. Always verify the restored mods by launching the sim and loading the aircraft. If you used symbolic links, you may need to recreate them after restoration. Keep a one-page “disaster recovery” checklist with the exact steps you followed during backup. Update it each time you change your backup method.

Advanced Techniques

If your primary sim drive is running low on space, you can move your entire mod collection to a larger drive and create symbolic links pointing to the original sim folder. This keeps the sim unaware that files are elsewhere. Managing symlinks manually is possible, but tools like Addon Linker for MSFS handle them automatically. For backup purposes, symlinks themselves are tiny files — you only need to back up the target folder, then restore the symlink structure. Document your symlink setup in a readme so you can reproduce it after a clean install.

Scripted Backup and Sync

Automate everything with a simple script. On Windows, use PowerShell to zip your mod folders, add a timestamp, and upload to cloud storage via the respective CLI tools (e.g., rclone for any cloud provider, or gdrive for Google Drive). Example: Compress-Archive -Path "D:\FlightSim Mods\*" -DestinationPath "E:\Backups\Mods_$((Get-Date).ToString('yyyyMMdd')).zip". Schedule this with Task Scheduler weekly. On Linux/macOS, a bash script using rsync to an external drive and duplicacy to the cloud provides robust, incremental, encrypted backups. These scripts can be enhanced to send you a notification on success or failure. The time invested in writing a solid backup script pays off every time you avoid a panic restore.

Conclusion

Backing up and managing aircraft mods on AeroSimulations is not an optional chore — it is an essential practice for any serious virtual pilot. A few hours spent setting up a reliable backup strategy and organizing your files can save days of recovery work and preserve the custom flying experience you have carefully built. Whether you choose a simple scheduled mirror backup or a full Git-tracked versioning system, the key is consistency and verification. Start today: define your backup locations, automate the process, document your mods, and test that your backups actually work. Your future self will thank you when an update breaks your favourite aircraft and you can restore it in minutes. Fly safe, and keep your mods safe too.