From 42f854af7f5528dc39b911d2c60f9185d5af0f85 Mon Sep 17 00:00:00 2001
From: SgtMate <SgtMate@users.noreply.github.com>
Date: Mon, 29 Jun 2026 11:00:26 +0200
Subject: [PATCH 1/8] restructure updateGTNH, add updateGTNHRessource

---
 scripts/start-deployGTNH | 121 ++++++++++++++++++++++-----------------
 1 file changed, 68 insertions(+), 53 deletions(-)

diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index 820740023fe..11bb01cd270 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -70,79 +70,94 @@ function deleteGTNHbackup(){
   fi
 }
 
+function updateGTNHRessource(){
+  local resource="$1"
+  local new_resource="$2"
+  log "Trying to update $resource"
+
+  if [[ -z "$resource" ]]; then
+    logWarning "No resource specified for update"
+    return 0
+  fi
+
+  if [[ -d "$resource" ]]; then
+    log "Deleting folder: $resource"
+    if ! rm -rf "$resource"; then
+      logError "Failed to delete folder: $resource"
+      exit 1
+    fi
+    if [[ -d "$new_resource" ]]; then
+      log "Copying $new_resource to /data"
+      if ! cp -r "$new_resource" "/data/"; then
+        logError "Failed to copy $new_resource to /data"
+        exit 1
+      fi
+    else
+      logWarning "Folder $new_resource not found in the unzipped data!"
+    fi
+    return 0
+  elif [[ -f "$resource" ]]; then
+    log "Deleting file: $resource"
+    if ! rm -f "$resource"; then
+      logError "Failed to delete file: $resource"
+      exit 1
+    fi
+    if [[ -f "$new_resource" ]]; then
+      log "Copying $new_resource to /data"
+      if ! cp "$new_resource" "/data/"; then
+        logError "Failed to copy $new_resource to /data"
+        exit 1
+      fi
+    else
+      logWarning "File $new_resource not found in the unzipped data!"
+    fi
+    return 0
+  fi
+
+  logWarning "Resource $resource does not exist"
+  return 0
+}
+
 function updateGTNH(){
   # Get the current date and time
-  current_datetime=$(date +%Y-%m-%dT%H:%M)
+  local current_datetime=$(date +%Y-%m-%dT%H:%M)
   
   # Define folders and files to update
-  folders_to_update=("libraries" "mods" "resources" "scripts")
-  files_to_update=("lwjgl3ify-forgePatches.jar" "java9args.txt" "startserver-java9.bat" "startserver-java9.sh" "forge-1.7.10-10.13.4.1614-1.7.10-universal.jar" "startserver.bat" "startserver.sh" "server-icon.png")
-  config_folder="config"
-  backup_folder="/data/gtnh-upgrade-$current_datetime"
-  journey_map_folder="JourneyMapServer"
-
-  # Delete specified folders if they exist
-  for folder in "${folders_to_update[@]}"; do
-      folder_path="/data/$folder"
-      if [[ -d "$folder_path" ]]; then
-          log "Deleting folder: $folder_path"
-          rm -rf "$folder_path"
-      fi
-  done
-
-  # Delete specific files if they exist
-  for file in "${files_to_update[@]}"; do
-      file_path="/data/$file"
-      if [[ -f "$file_path" ]]; then
-          log "Deleting file: $file_path"
-          rm -f "$file_path"
-      fi
-  done
+  # base_dir is already defined in handleGTNH function
+  local folders_to_update=("libraries" "mods" "resources" "scripts")
+  local files_to_update=("lwjgl3ify-forgePatches.jar" "java9args.txt" "startserver-java9.bat" "startserver-java9.sh" "forge-1.7.10-10.13.4.1614-1.7.10-universal.jar" "startserver.bat" "startserver.sh" "server-icon.png")
+  local config_folder="config"
+  local backup_folder="/data/gtnh-upgrade-$current_datetime"
+  local journey_map_folder="JourneyMapServer"
 
   # Backup the config folder
   if [[ -d "/data/$config_folder" ]]; then
       log "Creating backup of /data/$config_folder at $backup_folder"
       cp -r "/data/$config_folder" "$backup_folder"
-      log "Deleting original /data/$config_folder"
-      rm -rf "/data/$config_folder"
   fi
 
-  # Updating the required folders in data directory
-  for folder in "${folders_to_update[@]}" "$config_folder"; do
-    if [[ -d "$base_dir/$folder" ]]; then
-      log "Copying $folder to /data"
-      cp -r "$base_dir/$folder" "/data/"
-    else
-      logWarning "Folder $folder not found in the unzipped data!"
-    fi
-  done
-        
-  # Copy specific files to the /data directory
-  for file in "${files_to_update[@]}"; do
-    if [[ -f "$base_dir/$file" ]]; then
-      log "Copying $file to /data"
-      cp "$base_dir/$file" "/data/"
-    else
-      logWarning "File $file not found in the unzipped data!"
-    fi
-  done
+# Update ressources from unpacked server files to /data
+  for ressource in "${folders_to_update[@]}" "$config_folder ${files_to_update[@]}"; do
+    local resource_path="/data/$ressource"
+    local new_resource_path="$base_dir/$ressource"
 
-  # Ensure the config folder exists
-  if [[ ! -d "$config_folder" ]]; then
-      log "$config_folder does not exist. Creating it now."
-      mkdir -p "$config_folder"
-  fi
+    updateGTNHRessource "$resource_path" "$new_resource_path"
+  done
 
   # Restore JourneyMapServer folder from backup
   if [[ -d "$backup_folder/$journey_map_folder" ]]; then
-      log "Restoring $journey_map_folder to $config_folder"
-      cp -r "$backup_folder/$journey_map_folder" "$config_folder/"
+    if [[ ! -d "/data/$config_folder" ]]; then
+      log "/data/$config_folder folder does not exist. Creating it now."
+      mkdir -p "/data/$config_folder"
+    fi
+      log "Restoring $journey_map_folder to /data/$config_folder"
+      cp -r "$backup_folder/$journey_map_folder" "/data/$config_folder/"
   else
       logWarning "$journey_map_folder not found in backup!"
   fi
 
   # Copy the changelog file to /data
-  gtnh_changelog_file=$(mc-image-helper find --max-depth=1 --type=file --name=changelog*.md "$base_dir")
+  local gtnh_changelog_file=$(mc-image-helper find --max-depth=1 --type=file --name=changelog*.md "$base_dir")
   if [[ -n "$gtnh_changelog_file" ]]; then
     log "Copying changelog file to /data"
     cp -f "$gtnh_changelog_file" /data/

From 460f976e429e1d7a2b80566b5fc7155db307f426 Mon Sep 17 00:00:00 2001
From: SgtMate <SgtMate@users.noreply.github.com>
Date: Mon, 29 Jun 2026 15:55:55 +0200
Subject: [PATCH 2/8] simplify handleGTNH, add downloadGTNH, better logs

---
 scripts/start-deployGTNH | 86 +++++++++++++++++++++++-----------------
 1 file changed, 49 insertions(+), 37 deletions(-)

diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index 11bb01cd270..db5c130e5b9 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -59,6 +59,10 @@ function getGTNHdownloadPath(){
   
   fi
   
+  if [[ -z $gtnh_download_path ]]; then
+    logError "Server files not found! Please check if the selected GTNH_PACK_VERSION=$GTNH_PACK_VERSION is valid."
+    exit 1
+  fi
   debug "Download source URL: $gtnh_download_path"
 
 }
@@ -70,6 +74,41 @@ function deleteGTNHbackup(){
   fi
 }
 
+function downloadGTNH(){
+  local gtnh_download=""
+  base_dir=/data/.tmp/gtnh_base
+
+  debug "Creating temporary /data/.tmp/packs folder for GTNH download"
+  mkdir -p /data/.tmp/packs
+  trap 'rm -rf /data/.tmp' EXIT
+  
+  log "Downloading $gtnh_download_path."
+  if ! gtnh_download=$(mc-image-helper get -o /data/.tmp/packs --output-filename --skip-up-to-date "$gtnh_download_path"); then
+    logError "Failed to download $gtnh_download_path"
+    exit 1
+  fi
+  debug "Downloaded GTNH server files to $gtnh_download"
+
+  # Unpacking Server files into temporary directory
+  log "Unpacking Server Files into $base_dir"
+  mkdir -p "${base_dir}"
+  extract "${gtnh_download}" "${base_dir}"
+
+  # Remove any eula file since container manages it
+  debug "Removing eula.txt from $base_dir"
+  rm -f "${base_dir}/eula.txt"
+
+  # recalculate the actual base directory of content
+  if ! base_dir=$(mc-image-helper find \
+      --max-depth=3 --type=directory --name=mods,config \
+      --only-shallowest --fail-no-matches --format '%h' \
+      "$base_dir"); then
+    logError "Unable to find content base of downloaded Server Files"
+    exit 1
+  fi
+  debug "Base directory of unpacked Server Files: $base_dir"
+}
+
 function updateGTNHRessource(){
   local resource="$1"
   local new_resource="$2"
@@ -141,6 +180,7 @@ function updateGTNH(){
     local resource_path="/data/$ressource"
     local new_resource_path="$base_dir/$ressource"
 
+    debug "Updating resource: $resource_path with new resource: $new_resource_path"
     updateGTNHRessource "$resource_path" "$new_resource_path"
   done
 
@@ -159,6 +199,7 @@ function updateGTNH(){
   # Copy the changelog file to /data
   local gtnh_changelog_file=$(mc-image-helper find --max-depth=1 --type=file --name=changelog*.md "$base_dir")
   if [[ -n "$gtnh_changelog_file" ]]; then
+    debug "Found changelog file: $gtnh_changelog_file"
     log "Copying changelog file to /data"
     cp -f "$gtnh_changelog_file" /data/
   fi
@@ -178,46 +219,15 @@ function handleGTNH() {
   if [[ -n "$GTNH_PACK_VERSION" ]] && isFalse "$SKIP_GTNH_UPDATE_CHECK" ; then
     
     getGTNHdownloadPath
-    
-    if [[ -z $gtnh_download_path ]]; then
-    logError "Server files not found for GTNH_PACK_VERSION=$GTNH_PACK_VERSION! Download not possible!"
-    exit 1
-    fi
     log "Server files located! Will proceed update $gtnh_download_path."
 
+
     # Decide if update or install is needed or not.
-    if [[ ! -f /data/.gtnh-version || "$(basename "$gtnh_download_path")" != "$(cat /data/.gtnh-version)" ]]; then
+    if [[ ! -f /data/.gtnh-version || "$(basename "$gtnh_dDecideownload_path")" != "$(cat /data/.gtnh-version)" ]]; then
       log "Update/Install required: /data/.gtnh-version is missing or does not match the selected version $(basename "$gtnh_download_path")."
 
-      mkdir -p /data/packs
-      log "Downloading $gtnh_download_path."
-      if ! gtnh_download=$(mc-image-helper get -o /data/packs --output-filename --skip-up-to-date "$gtnh_download_path"); then
-        logError "Failed to download $gtnh_download_path"
-        exit 1
-      fi
-      
-      # Unpacking Server files into temporary directory
-      log "Unpacking Server Files..."
-      original_base_dir=/data/.tmp/gtnh_base
-      base_dir=$original_base_dir
-      rm -rf "${base_dir}"
-      mkdir -p "${base_dir}"
-      extract "${gtnh_download}" "${base_dir}"
-      trap 'rm -rf /data/.tmp' EXIT
-      # Removing downloaded zip
-      rm -f "$gtnh_download"
-
-      # Remove any eula file since container manages it
-      rm -f "${base_dir}/eula.txt"
-
-      # recalculate the actual base directory of content
-      if ! base_dir=$(mc-image-helper find \
-          --max-depth=3 --type=directory --name=mods,config \
-          --only-shallowest --fail-no-matches --format '%h' \
-          "$base_dir"); then
-        logError "Unable to find content base of downloaded Server Files"
-        exit 1
-      fi
+      # Download and unpack GTNH server files
+      downloadGTNH
 
       # Split installation from update path. Check for version file.
       if [[ -f /data/.gtnh-version ]]; then
@@ -227,10 +237,12 @@ function handleGTNH() {
         log "No .gtnh-version file detected! Assuming no old server exists. Proceed installing new server..."
         cp -R -f "${base_dir}"/* /data
       fi
+
       # Update .gtnh-version
       basename "$gtnh_download_path" > /data/.gtnh-version
-      # Cleaning up
-      rm -rf "$original_base_dir"
+      
+      # Cleaning up temporary files
+      rm -rf /data/.tmp
     
     else
       log "No update required: /data/.gtnh-version matches the selected version $(basename "$gtnh_download_path")."

From af692ce7392c14315c3ed623b601cc0cb2a227cc Mon Sep 17 00:00:00 2001
From: SgtMate <SgtMate@users.noreply.github.com>
Date: Mon, 29 Jun 2026 16:16:14 +0200
Subject: [PATCH 3/8] small log addition

---
 scripts/start-deployGTNH | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index db5c130e5b9..ed42f1aea88 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -228,6 +228,7 @@ function handleGTNH() {
 
       # Download and unpack GTNH server files
       downloadGTNH
+      log "GTNH server files downloaded and unpacked to $base_dir."
 
       # Split installation from update path. Check for version file.
       if [[ -f /data/.gtnh-version ]]; then
@@ -240,7 +241,7 @@ function handleGTNH() {
 
       # Update .gtnh-version
       basename "$gtnh_download_path" > /data/.gtnh-version
-      
+
       # Cleaning up temporary files
       rm -rf /data/.tmp
     

From 2c27ae91ed0b10dd6403c5e2e8cd2ffebf74d2c8 Mon Sep 17 00:00:00 2001
From: Leon Kampwerth <77398841+SgtMate@users.noreply.github.com>
Date: Tue, 30 Jun 2026 22:57:36 +0200
Subject: [PATCH 4/8] small fixes and improved ressource updating logic

---
 scripts/start-deployGTNH | 45 ++++++++++++++++------------------------
 1 file changed, 18 insertions(+), 27 deletions(-)

diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index ed42f1aea88..df4b617ee35 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -119,41 +119,32 @@ function updateGTNHRessource(){
     return 0
   fi
 
-  if [[ -d "$resource" ]]; then
-    log "Deleting folder: $resource"
+  if [[ -e "$resource" ]]; then
+    log "Deleting existing resource: $resource"
     if ! rm -rf "$resource"; then
-      logError "Failed to delete folder: $resource"
+      logError "Failed to delete resource: $resource"
       exit 1
     fi
-    if [[ -d "$new_resource" ]]; then
-      log "Copying $new_resource to /data"
-      if ! cp -r "$new_resource" "/data/"; then
-        logError "Failed to copy $new_resource to /data"
-        exit 1
-      fi
-    else
-      logWarning "Folder $new_resource not found in the unzipped data!"
+  fi
+
+  if [[ -d "$new_resource" ]]; then
+    log "Copying $new_resource to /data"
+    if ! cp -r "$new_resource" "/data/"; then
+      logError "Failed to copy $new_resource to /data"
+      exit 1
     fi
     return 0
-  elif [[ -f "$resource" ]]; then
-    log "Deleting file: $resource"
-    if ! rm -f "$resource"; then
-      logError "Failed to delete file: $resource"
+  fi
+  if [[ -f "$new_resource" ]]; then
+    log "Copying $new_resource to /data"
+    if ! cp "$new_resource" "/data/"; then
+      logError "Failed to copy $new_resource to /data"
       exit 1
     fi
-    if [[ -f "$new_resource" ]]; then
-      log "Copying $new_resource to /data"
-      if ! cp "$new_resource" "/data/"; then
-        logError "Failed to copy $new_resource to /data"
-        exit 1
-      fi
-    else
-      logWarning "File $new_resource not found in the unzipped data!"
-    fi
     return 0
   fi
 
-  logWarning "Resource $resource does not exist"
+  logWarning "Resource $resource does not exist and $new_resource was not found in the unzipped data!"
   return 0
 }
 
@@ -176,7 +167,7 @@ function updateGTNH(){
   fi
 
 # Update ressources from unpacked server files to /data
-  for ressource in "${folders_to_update[@]}" "$config_folder ${files_to_update[@]}"; do
+  for ressource in "${folders_to_update[@]}" "$config_folder" "${files_to_update[@]}"; do
     local resource_path="/data/$ressource"
     local new_resource_path="$base_dir/$ressource"
 
@@ -223,7 +214,7 @@ function handleGTNH() {
 
 
     # Decide if update or install is needed or not.
-    if [[ ! -f /data/.gtnh-version || "$(basename "$gtnh_dDecideownload_path")" != "$(cat /data/.gtnh-version)" ]]; then
+    if [[ ! -f /data/.gtnh-version || "$(basename "$gtnh_download_path")" != "$(cat /data/.gtnh-version)" ]]; then
       log "Update/Install required: /data/.gtnh-version is missing or does not match the selected version $(basename "$gtnh_download_path")."
 
       # Download and unpack GTNH server files

From 2cbef57c6026d642e7c2a5a0230dfe2d617aa503 Mon Sep 17 00:00:00 2001
From: Leon Kampwerth <77398841+SgtMate@users.noreply.github.com>
Date: Tue, 30 Jun 2026 23:01:31 +0200
Subject: [PATCH 5/8] cosmetics for new variables

---
 scripts/start-deployGTNH | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index df4b617ee35..7f23b215259 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -7,7 +7,8 @@
 function getGTNHdownloadPath(){
   gtnh_download_path=""
   local release_object=""
-  local current_java_version=$(mc-image-helper java-release)
+  local current_java_version=""
+  current_java_version=$(mc-image-helper java-release)
 
   # Select release JSON object
   if [ "$GTNH_PACK_VERSION" == "latest-dev" ]; then
@@ -150,7 +151,8 @@ function updateGTNHRessource(){
 
 function updateGTNH(){
   # Get the current date and time
-  local current_datetime=$(date +%Y-%m-%dT%H:%M)
+  local current_datetime=""
+  current_datetime=$(date +%Y-%m-%dT%H:%M)
   
   # Define folders and files to update
   # base_dir is already defined in handleGTNH function
@@ -188,7 +190,8 @@ function updateGTNH(){
   fi
 
   # Copy the changelog file to /data
-  local gtnh_changelog_file=$(mc-image-helper find --max-depth=1 --type=file --name=changelog*.md "$base_dir")
+  local gtnh_changelog_file=""
+  gtnh_changelog_file=$(mc-image-helper find --max-depth=1 --type=file --name=changelog*.md "$base_dir")
   if [[ -n "$gtnh_changelog_file" ]]; then
     debug "Found changelog file: $gtnh_changelog_file"
     log "Copying changelog file to /data"

From 779818ea1f74f121b20e5c9c2035465252e82b72 Mon Sep 17 00:00:00 2001
From: Leon Kampwerth <77398841+SgtMate@users.noreply.github.com>
Date: Wed, 1 Jul 2026 00:46:48 +0200
Subject: [PATCH 6/8] small cosmetic changes and new checks

---
 compose-dev.yml          |  9 +++++++++
 scripts/start-deployGTNH | 21 +++++++++++++--------
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/compose-dev.yml b/compose-dev.yml
index d60a2ab4fc6..648c61b87dc 100644
--- a/compose-dev.yml
+++ b/compose-dev.yml
@@ -4,6 +4,15 @@ services:
       context: .
     environment:
       EULA: true
+      TYPE: GTNH
+      GTNH_PACK_VERSION: latest-dev
+      # Enable to delete old config backups
+      # GTNH_DELETE_BACKUPS: false
+      # Use to prevent updates
+      # SKIP_GTNH_UPDATE_CHECK: true
+      DEBUG: true
+      MEMORY: 6G
+      # Bring in st
     volumes:
       - ./scripts:/image/scripts:ro
       - data:/data
diff --git a/scripts/start-deployGTNH b/scripts/start-deployGTNH
index 7f23b215259..1b03ad36ff1 100755
--- a/scripts/start-deployGTNH
+++ b/scripts/start-deployGTNH
@@ -39,6 +39,11 @@ function getGTNHdownloadPath(){
     log "Selected $(jq -r '.key' <<< "$release_object") as matching version for download."
   
   fi
+
+  if [[ -z $release_object ]]; then
+    logError "No release found for GTNH_PACK_VERSION=$GTNH_PACK_VERSION. Please check if the version is valid."
+    exit 1
+  fi
   
   # Select compatible server files for java version
   if (( current_java_version == 8 )); then
@@ -110,7 +115,7 @@ function downloadGTNH(){
   debug "Base directory of unpacked Server Files: $base_dir"
 }
 
-function updateGTNHRessource(){
+function updateGTNHresource(){
   local resource="$1"
   local new_resource="$2"
   log "Trying to update $resource"
@@ -145,14 +150,14 @@ function updateGTNHRessource(){
     return 0
   fi
 
-  logWarning "Resource $resource does not exist and $new_resource was not found in the unzipped data!"
+  logWarning "Resource update failed: $new_resource does not exist!"
   return 0
 }
 
 function updateGTNH(){
   # Get the current date and time
   local current_datetime=""
-  current_datetime=$(date +%Y-%m-%dT%H:%M)
+  current_datetime=$(date +%Y-%m-%dT+%H%M)
   
   # Define folders and files to update
   # base_dir is already defined in handleGTNH function
@@ -168,13 +173,13 @@ function updateGTNH(){
       cp -r "/data/$config_folder" "$backup_folder"
   fi
 
-# Update ressources from unpacked server files to /data
-  for ressource in "${folders_to_update[@]}" "$config_folder" "${files_to_update[@]}"; do
-    local resource_path="/data/$ressource"
-    local new_resource_path="$base_dir/$ressource"
+# Update resources from unpacked server files to /data
+  for resource in "${folders_to_update[@]}" "$config_folder" "${files_to_update[@]}"; do
+    local resource_path="/data/$resource"
+    local new_resource_path="$base_dir/$resource"
 
     debug "Updating resource: $resource_path with new resource: $new_resource_path"
-    updateGTNHRessource "$resource_path" "$new_resource_path"
+    updateGTNHresource "$resource_path" "$new_resource_path"
   done
 
   # Restore JourneyMapServer folder from backup

From ba2c652838da7a5ba8911a4c769bd41ecfe73c5a Mon Sep 17 00:00:00 2001
From: Leon Kampwerth <77398841+SgtMate@users.noreply.github.com>
Date: Wed, 1 Jul 2026 00:47:34 +0200
Subject: [PATCH 7/8] change back compose-dev

---
 compose-dev.yml | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/compose-dev.yml b/compose-dev.yml
index 648c61b87dc..d60a2ab4fc6 100644
--- a/compose-dev.yml
+++ b/compose-dev.yml
@@ -4,15 +4,6 @@ services:
       context: .
     environment:
       EULA: true
-      TYPE: GTNH
-      GTNH_PACK_VERSION: latest-dev
-      # Enable to delete old config backups
-      # GTNH_DELETE_BACKUPS: false
-      # Use to prevent updates
-      # SKIP_GTNH_UPDATE_CHECK: true
-      DEBUG: true
-      MEMORY: 6G
-      # Bring in st
     volumes:
       - ./scripts:/image/scripts:ro
       - data:/data

From e6a5dd881d76521dc47adbb0447990b2ff2f9b41 Mon Sep 17 00:00:00 2001
From: Leon Kampwerth <77398841+SgtMate@users.noreply.github.com>
Date: Wed, 1 Jul 2026 00:51:07 +0200
Subject: [PATCH 8/8] improve gtnh backup documentation

---
 docs/types-and-platforms/mod-platforms/gtnh.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/types-and-platforms/mod-platforms/gtnh.md b/docs/types-and-platforms/mod-platforms/gtnh.md
index fdbaff6432f..8b9a6266ab4 100644
--- a/docs/types-and-platforms/mod-platforms/gtnh.md
+++ b/docs/types-and-platforms/mod-platforms/gtnh.md
@@ -35,7 +35,7 @@ For optimal performance choose java25 with GTNH 2.8.0 and later.
 
 ## Config backups
 
-During version upgrade, the server will replace all config files to make sure all new features are setup as intended. The old config files are stored in a backup folder in the data directory, for you to use as reference for manual reapplication of your changed settings. Set the environment variable `GTNH_DELETE_BACKUPS` to true to delete all backup folders at startup. 
+During version upgrade, the server will replace all config files to make sure all new features are setup as intended. The old config files are stored in a backup folder in the data directory, for you to use as reference for manual reapplication of your changed settings. The folder name starts with `gtnh-upgrade-` followed by a timestamp. Set the environment variable `GTNH_DELETE_BACKUPS` to true to delete all backup folders at startup. 
 
 ## server.properties defaults