Version 3.0 is here, and your V2.6 world can come with you. Your save data can still work in V3.0, but you should not update your 7 Days to Die server without preparing first.
The main change is the new sandbox system. Old V2.6 difficulty settings like Warrior or Adventurer do not transfer exactly the same way. Instead, V3.0 uses a new SandboxCode setting to control difficulty and world rules.
This guide explains how to back up your world, update your config, move your save, test the server, and avoid the most common 7D2D server migration problems.
Before You Migrate - Critical Preparation
Migrating is simple, but mistakes can break saves. Before changing anything, back up your files and write down your old settings.
Step 1: Backup Everything
Back up these files before updating:
- Your V2.6 save game folder
- Your V2.6
serverconfig.xml - Any mods or custom config files
- Any manual world backups
Common save locations:
Windows Local Play:C:\Users\[YourUsername]\AppData\Roaming\7DaysToDie\Saves\
Windows Dedicated Server:[Server Installation]\UserData\Saves\
Mac:~/Library/Application Support/7DaysToDie/Saves/
Linux:~/.local/share/7DaysToDie/Saves/
Copy the full Saves folder somewhere safe. Do not only copy one file, because world data, player data, and chunk data are stored across multiple files.
Step 2: Document Your V2.6 Settings
Open your old serverconfig.xml and note important settings like:
GameDifficultyBlockDamagePlayerBlockDamageAIXPMultiplierEnemyDifficultyZombieMoveBloodMoonFrequencyLootAbundance
These values help you recreate the feel of your old world in V3.0.
Step 3: Stop Your Server
If you are running a public server, shut it down completely before moving files or editing configs. Do not migrate while players are online.
Step 4: Update The Game Client
Make sure your game is updated to the latest stable V3.0 release. On Steam, right-click 7 Days to Die, open Properties, go to Updates, and make sure you are not using an experimental branch.
Understanding V2.6 To V3.0 Changes
V2.6 used separate difficulty settings inside serverconfig.xml. V3.0 replaces many of these with the new sandbox system.
What Changed
V2.6 had difficulty presets and separate config values. V3.0 has more sandbox customization and uses SandboxCode to control many world settings from one value.
Compatibility
Your V2.6 world can still load in V3.0. Your structures, storage, inventories, and player progress should remain intact if the save is copied correctly.
The main thing you need to recreate is your difficulty setup.
Default SandboxCode For Migration
If you are unsure what to use, start with the default SandboxCode:
<property name="SandboxCode" value="AAAJABJACJADJARFBNC"/>
This is a good starting point for a default-style world. If your old server was harder, easier, or heavily customized, create a new SandboxCode from a V3.0 test world.
Finding Your V2.6 Difficulty Equivalent
Old difficulty settings do not match perfectly, but you can use this as a rough guide:
- Scavenger → Easier V3.0 sandbox settings
- Nomad → Medium V3.0 sandbox settings
- Warrior → Harder V3.0 sandbox settings
- Adventurer → Default SandboxCode
Always test before inviting your group back.
Step-By-Step Migration Process For
Step 1: Create A Test World In 3.0
Create a fresh V3.0 test world first. Adjust the sandbox settings until they feel close to your old world, then copy the generated SandboxCode.
Step 2: Update Your serverconfig.xml
Back up your old serverconfig.xml, then use a fresh V3.0 config as your base.
Old V2.6 settings may look like this:
<property name="GameDifficulty" value="1"/>
<property name="BlockDamagePlayer" value="1"/>
<property name="XPMultiplier" value="1"/>
In V3.0, these are replaced by:
<property name="SandboxCode" value="AAAJABJACJADJARFBNC"/>
Step 3: Place Your V2.6 Save In The New Location
Copy your full V2.6 save folder into the V3.0 saves directory.
Make sure the server config points to the correct world name.
Step 4: Start Your Server With New Config
Start the server and watch the console. If your old world name appears, the save is likely being loaded correctly.
If the server creates a blank world, stop it and check the save path, world name, and config.
Step 5: Join And Verify
Join before inviting players. Check your base, storage, character, inventory, terrain, zombie behavior, loot, and Blood Moon settings.
Troubleshooting Common Migration Issues
Issue #1: World Doesn't Load
Check that the save folder is in the right location and that your config points to the correct world name. If needed, restore your backup and copy the save again.
Issue #2: Settings Feel Wrong
Your SandboxCode probably does not match your old setup. Create another V3.0 test world, adjust the settings, copy the new SandboxCode, and restart.
Issue #3: Character Data Missing
This usually means player data was not copied correctly. Restore your backup and move the full save folder again.
Issue #4: Mods Causing Issues
Remove all mods and test the world in vanilla V3.0 first. Add mods back one at a time after confirming the world works.
Issue #5: Save File Corrupted
Restore your backup and transfer the save again. Avoid editing or copying files while the server is running.
Issue #6: Chunk Data Missing Or Weird Terrain
This usually comes from an incomplete transfer. Restore the backup, upload the full save again, and check that all world files are included.
What's Different In Your V2.6 World Now
Your world may load correctly, but V3.0 can still feel different because of new sandbox settings, item progression, POIs, and balance changes.
New Systems
Newly explored areas and new loot may use V3.0 systems. Older items and explored areas should still work, but your world may feel slightly different after the update.
What's The Same
Your structures, storage, character progress, skills, and base should remain intact if the migration was done correctly.
Dedicated Server Migration Advantages
Dedicated 7D2D hosting makes migration easier because backups, file access, config editing, and restarts are handled from one panel.
Self-hosting works, but you are responsible for every file path, update, backup, permission issue, and restore. With proper 7 Days to Die server hosting, it is easier to test changes, recover backups, and keep your multiplayer world online.
If you are looking for the best 7D2D hosting, focus on backup access, file manager support, mod support, fast storage, and reliable support.
When Migration Goes Wrong
If something breaks, stop the server and restore your backup. Then check your save path, world name, serverconfig.xml, and SandboxCode.
Do not add mods until the vanilla V3.0 world loads correctly.
Ready To Migrate?
Migrating from V2.6 to V3.0 is straightforward if you back up first, update your config, move the save correctly, and test before inviting players.
If you want to avoid the manual work of updates, backups, file paths, and config editing, Pine Hosting offers 7 Days to Die server hosting built for smooth multiplayer worlds. Start your server, manage your files, adjust your settings, and migrate your 7D2D world with confidence.
