diff --git a/main.inc.sh b/main.inc.sh
index 1523208..2c59333 100755
--- a/main.inc.sh
+++ b/main.inc.sh
@@ -14,6 +14,7 @@ EXT=tgz.gpg
 LIST_EXT=txt
 
 DOCKER="/usr/bin/docker compose -f /var/docker/run/docker-compose.yml --ansi never"
+SYNO_USB=/usr/syno/bin/synousbdisk
 
 LOG_RECIPIENT=hb242@pm.me
 INFO=INFO
@@ -26,70 +27,7 @@ WRN=":::"
 ERR="###"
 DBG="==="
 
-dump_mariadb() {
-    log $DEBUG "$DBG dump_mariadb( $@ )"
-    local dump_dir=$1
-    local mysqlconnect="--user=root --password=snafu"
-
-    log $DEBUG "$DBG > \$DOCKER exec mysql /usr/bin/mariadb --silent --user=xxx --password=xxx -e \"show databases\" -B"
-    for db in $($DOCKER exec mysql /usr/bin/mariadb --silent $mysqlconnect -e "show databases" -B 2>>$LOG_FILE | grep -v information_schema 2>>$LOG_FILE | grep -v performance_schema 2>>$LOG_FILE | sed -e 's/\r//' 2>>$LOG_FILE); do
-        log $DEBUG "$DBG   > \$DOCKER exec mysql /usr/bin/mariadb-dump --hex-blob --user=xxx --password=xxx --databases $db"
-        $DOCKER exec mysql /usr/bin/mariadb-dump --hex-blob $mysqlconnect --databases $db >$dump_dir/$db.sql 2>>$LOG_FILE
-        is_error $? false && return 1
-    done
-    return 0
-}
-
-dump_postgresql() {
-    log $DEBUG "$DBG dump_postgresql( $@ )"
-    local dump_dir=$1
-    
-    # users and roles
-    log $DEBUG "$DBG > \$DOCKER exec -u=postgres postgres pg_dumpall --globals-only"
-    $DOCKER exec -u=postgres postgres pg_dumpall --globals-only > $dump_dir/_globals.sql 2>>$LOG_FILE
-
-    log $DEBUG "$DBG \$DOCKER exec -u=postgres postgres psql -t -c \"select datname from pg_database where not datistemplate\""
-    for db in $($DOCKER exec -u=postgres postgres psql -t -c "select datname from pg_database where not datistemplate" 2>>$LOG_FILE); do 
-        log $DEBUG "$DBG   > \$DOCKER exec -u=postgres postgres pg_dump --create $db"
-        $DOCKER exec -u=postgres postgres pg_dump --create $db > $dump_dir/$db.sql 2>>$LOG_FILE
-        is_error $? false && return 1
-    done
-    return 0
-}
-
-start_docker() {
-    log $DEBUG "$DBG start_docker()"
-    log $DEBUG "$DBG > \$DOCKER up -d"
-    $DOCKER up -d >>$LOG_FILE 2>&1
-    return $?
-}
-
-stop_docker() {
-    log $DEBUG "$DBG stop_docker()"
-    log $DEBUG "$DBG > \$DOCKER down"
-    $DOCKER down >>$LOG_FILE 2>&1
-    return $?
-}
-
-# Script per ssh auf Server $1 im Hintergrund starten
-#
-# ssh start in background
-# -> https://stackoverflow.com/questions/29142/getting-ssh-to-execute-a-command-in-the-background-on-target-machine#comment107117479_29172
-#
-# $1 - Server
-# $@ - Script incl. Parameter
-#
-run_script_remote() {
-    local server=$1
-    shift
-    ssh $server "sudo sh -c 'nohup $@ &>/dev/null </dev/null &'"
-}
-
-# check if function $1 exists
-#
-# returns true/false
-#
-isFunction() { declare -Ff "$1" ; }
+# ----- logging -----
 
 # Log-Datei schreiben.
 #
@@ -128,7 +66,7 @@ send_mail_log() {
     local subject="$@"
     log $DEBUG "$DBG send_mail_log()"
     log $DEBUG "$DBG > $HERE/mail.sh $LOG_RECIPIENT \"[$HOST_NAME] $subject\" $MAIL_LOG_FILE"
-    $HERE/mail.sh $LOG_RECIPIENT "[$HOST_NAME] Nightly Backup" $MAIL_LOG_FILE >>$LOG_FILE 2>&1
+    $HERE/mail.sh $LOG_RECIPIENT "[$HOST_NAME] $subject" $MAIL_LOG_FILE >>$LOG_FILE 2>&1
 }
 
 # Alte Logs löschen
@@ -137,13 +75,82 @@ prune_logs() {
     log $DEBUG "$DBG prune_logs()"
     # Dateien älter als 14 Tage löschen
     log $DEBUG "$DBG > find \"$LOG_FILE_PATH\" -type f -mtime +14 -delete"
-    find "$LOG_FILE_PATH" -type f -mtime +14 -delete &>>$LOG_FILE
+    find "$LOG_FILE_PATH" -type f -mtime +14 -delete >>$LOG_FILE 2>&1
     if [ $? -ne 0 ]; then
         # Fehler nur protokollieren, kein Grund abzubrechen
         mail_log $ERROR "$ERR error deleting old log files."
     fi
 }
 
+# ----- db dump -----
+
+dump_mariadb() {
+    log $DEBUG "$DBG dump_mariadb( $@ )"
+    local dump_dir=$1
+    local mysqlconnect="--user=root --password=snafu"
+
+    log $DEBUG "$DBG > \$DOCKER exec mysql /usr/bin/mariadb --silent --user=xxx --password=xxx -e \"show databases\" -B"
+    for db in $($DOCKER exec mysql /usr/bin/mariadb --silent $mysqlconnect -e "show databases" -B 2>>$LOG_FILE | grep -v information_schema 2>>$LOG_FILE | grep -v performance_schema 2>>$LOG_FILE | sed -e 's/\r//' 2>>$LOG_FILE); do
+        log $DEBUG "$DBG   > \$DOCKER exec mysql /usr/bin/mariadb-dump --hex-blob --user=xxx --password=xxx --databases $db"
+        $DOCKER exec mysql /usr/bin/mariadb-dump --hex-blob $mysqlconnect --databases $db >$dump_dir/$db.sql 2>>$LOG_FILE
+        is_error $? false && return 1
+    done
+    return 0
+}
+
+dump_postgresql() {
+    log $DEBUG "$DBG dump_postgresql( $@ )"
+    local dump_dir=$1
+    
+    # users and roles
+    log $DEBUG "$DBG > \$DOCKER exec -u=postgres postgres pg_dumpall --globals-only"
+    $DOCKER exec -u=postgres postgres pg_dumpall --globals-only > $dump_dir/_globals.sql 2>>$LOG_FILE
+
+    log $DEBUG "$DBG \$DOCKER exec -u=postgres postgres psql -t -c \"select datname from pg_database where not datistemplate\""
+    for db in $($DOCKER exec -u=postgres postgres psql -t -c "select datname from pg_database where not datistemplate" 2>>$LOG_FILE); do 
+        log $DEBUG "$DBG   > \$DOCKER exec -u=postgres postgres pg_dump --create $db"
+        $DOCKER exec -u=postgres postgres pg_dump --create $db > $dump_dir/$db.sql 2>>$LOG_FILE
+        is_error $? false && return 1
+    done
+    return 0
+}
+
+# ----- helper functions -----
+
+start_docker() {
+    log $DEBUG "$DBG start_docker()"
+    log $DEBUG "$DBG > \$DOCKER up -d"
+    $DOCKER up -d >>$LOG_FILE 2>&1
+    return $?
+}
+
+stop_docker() {
+    log $DEBUG "$DBG stop_docker()"
+    log $DEBUG "$DBG > \$DOCKER down"
+    $DOCKER down >>$LOG_FILE 2>&1
+    return $?
+}
+
+# Script per ssh auf Server $1 im Hintergrund starten
+#
+# ssh start in background
+# -> https://stackoverflow.com/questions/29142/getting-ssh-to-execute-a-command-in-the-background-on-target-machine#comment107117479_29172
+#
+# $1 - Server
+# $@ - Script incl. Parameter
+#
+run_script_remote() {
+    local server=$1
+    shift
+    ssh $server "sudo sh -c 'nohup $@ &>/dev/null </dev/null &'"
+}
+
+# check if function $1 exists
+#
+# returns true/false
+#
+isFunction() { declare -Ff "$1" ; }
+
 # check if $1 is error (!=0) and write result to log
 #
 # $1 - return code to check
@@ -278,6 +285,8 @@ delete_dir() {
     return 1
 }
 
+# ----- backup -----
+
 # Slashes "/" im Pfadnamen durch Dashes "-" ersetzen, so dass der String als Dateiname verwendet werden kann.
 #
 # $1 - path 
@@ -415,7 +424,7 @@ backup_daily() {
     # ggf. weekly backup starten (z.ZT. nur auf NAS)
     if [ $HAS_WEEKLY -a $WEEKLY_DAY -eq $DAY ]; then
         log $DEBUG "$DBG starting weekly backup"
-        nohup $THIS_SCRIPT -w &>>$LOG_FILE </dev/null &
+        nohup $THIS_SCRIPT -w >>$LOG_FILE 2>&1 </dev/null &
     fi
 }
 backup_weekly() {
@@ -431,20 +440,7 @@ backup_weekly() {
     send_mail_log "Weekly Backup"
 }
 
-# Inhalt des Archivs in eine Textdatei ausgeben.
-#
-# $1 - Archiv
-#
-# returns 0 for success, 1 otherwise
-#
-create_list() {
-    log $DEBUG "$DBG create_list( $@ )"
-    local archive=$1
-    log $DEBUG "$DBG > gpg --batch --decrypt --passphrase xxxx \"$archive\" | tar -tzv | tee \"$archive.$LIST_EXT\""
-    gpg --batch --decrypt --passphrase $PASSPHRASE "$archive" 2>>$LOG_FILE | tar -tzv 2>>$LOG_FILE | tee "$archive.$LIST_EXT" >/dev/null 2>>$LOG_FILE
-    check_pipe_rc ${PIPESTATUS[@]}
-    return $?
-}
+# ----- integrity -----
 
 # Integrität des Archivs testen, indem es entschlüsselt, entpackt 
 # und der Inhalt auf /dev/null ausgegeben wird.
@@ -462,6 +458,8 @@ test_integrity() {
     return $?
 }
 
+# ----- restore -----
+
 # Restore aus Archiv
 #
 # Wird nach pwd ausgegeben!
@@ -481,6 +479,23 @@ restore() {
     return $?
 }
 
+# ----- archive content ------
+
+# Inhalt des Archivs in eine Textdatei ausgeben.
+#
+# $1 - Archiv
+#
+# returns 0 for success, 1 otherwise
+#
+create_list() {
+    log $DEBUG "$DBG create_list( $@ )"
+    local archive=$1
+    log $DEBUG "$DBG > gpg --batch --decrypt --passphrase xxxx \"$archive\" | tar -tzv | tee \"$archive.$LIST_EXT\""
+    gpg --batch --decrypt --passphrase $PASSPHRASE "$archive" 2>>$LOG_FILE | tar -tzv 2>>$LOG_FILE | tee "$archive.$LIST_EXT" >/dev/null 2>>$LOG_FILE
+    check_pipe_rc ${PIPESTATUS[@]}
+    return $?
+}
+
 # Liste der Archives auf stdout ausgeben
 #
 # Zeigt alle Archive incl. Verzeichnis (ohne $1) an
@@ -520,22 +535,61 @@ list_archive_content() {
     cat "$root/${archive/#\//}.$LIST_EXT" 2>>$LOG_FILE
 }
 
-# --- export ---
+# ----- export -----
+
+# Synology-NAS (0) or not (1 - linux)?
+#
+is_synology() {
+    if [ -f $SYNO_USB ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Find exfat formatted device
+#
+# returns device name
+#
+get_usb_device() {
+    if is_synology; then
+        echo $(get_usb_device_syno)
+    else
+        echo $(get_usb_device_linux)
+    fi
+}
+
+# USB-HDD auf Synology-NAS ermitteln
+#
+get_usb_device_syno() {
+    log $DEBUG "$DBG get_usb_device_syno()"
+    log $DEBUG "$DBG > $SYNO_USB -enum | grep -v devices | wc -l"
+    if [ "$($SYNO_USB -enum 2>>$LOG_FILE | grep -v devices 2>>$LOG_FILE | wc -l 2>>$LOG_FILE)" != "1" ]; then
+        mail_log $ERROR "$ERR no USB device or too many found @$HOST_NAME."
+        return 1
+    fi
+    log $DEBUG "$DBG > $SYNO_USB -enum | grep -v devices"
+    echo $($SYNO_USB -enum 2>>$LOG_FILE | grep -v devices 2>>$LOG_FILE)
+    return 0
+}
 
 # exfat-formatierte USB-HDD auf Linux-Server ermitteln
 #
-get_usb_device() {
+get_usb_device_linux() {
+    log $DEBUG "$DBG get_usb_device_linux()"
     local fstype=exfat 
     local lsblk="lsblk -o KNAME,TYPE,SIZE,MODEL,FSTYPE"
     local device
+    log $DEBUG "$DBG $lsblk | grep $fstype | wc -l"
     if [ "$($lsblk 2>>$LOG_FILE | grep $fstype 2>>$LOG_FILE | wc -l 2>>$LOG_FILE)" != "1" ]; then
-        echo "ERROR could not query devices"
+        mail_log $ERROR "$ERR could not query devices."
         return 1 
     fi
     
+    log $DEBUG "$DBG $lsblk | grep $fstype | sed -E 's/^(\S*).*$/\1/'"
     device=$($lsblk 2>>$LOG_FILE | grep $fstype 2>>$LOG_FILE | sed -E 's/^(\S*).*$/\1/' 2>>$LOG_FILE) 
     if [ -z "$device" ]; then
-        echo "ERROR no exfat USB device found"
+        mail_log $ERROR "$ERR no exfat USB device found."
         return 1
     fi
 
@@ -543,42 +597,104 @@ get_usb_device() {
     return 0
 }
 
-# USB-HDD auf Linux-Server mounten
+# Mount UsB-HDD
 #
-# $1 - device (ohne /dev/)
+# returns mount point
 #
 mount_usb_device() {
+    if is_synology; then
+        echo $(mount_usb_device_syno $1)
+    else
+        echo $(mount_usb_device_linux $1)
+    fi
+}
+
+# Check if auto mounted device is exfat and return mount point
+# (fn for consitence with linux fn)
+#
+# $1 - device name
+# returns mount point
+# 
+mount_usb_device_syno() {
+    log $DEBUG "$DBG mount_usb_device_syno( $@ )"
     local device=$1
-    local mount_point=/var/mnt/backup
-    check_directory $mount_point
-    if [ $? -ne 0 ]; then
-        echo "ERROR mount point does't exist"
+    log $DEBUG "$DBG > $SYNO_USB -info $device | grep -i \"file system\" | sed -E \"s/.*:\s*(.*)\s*/\1/\""
+    local fs=$($SYNO_USB -info $device 2>>$LOG_FILE | grep -i "file system" 2>>$LOG_FILE | sed -E "s/.*:\s*(.*)\s*/\1/" 2>>$LOG_FILE)
+    if [ "$fs" != "exfat" ]; then
+        mail_log $ERROR "$ERR device $device not exfat formatted."
         return 1
     fi
-    mount /dev/$device $mount_point >>$LOG_FILE 2>&1
-    if [ $? -ne 0 ]; then
-        echo "ERROR mounting $device"
+    # get mount point
+    log $DEBUG "$DBG > $SYNO_USB -info $device | grep -i \"mount path\" | sed -E \"s/.*:\s*(.*)\s*/\1/\""
+    local mount_point=$($SYNO_USB -info $device 2>>$LOG_FILE | grep -i "mount path" 2>>$LOG_FILE | sed -E "s/.*:\s*(.*)\s*/\1/" 2>>$LOG_FILE)
+    if [ $? -ne 0 ] || [ ! -d $mount_point ]; then
+        mail_log $ERROR "$ERR mount point \"$mount_point\" does not exist."
         return 1
     fi
     echo $mount_point
     return 0
 }
 
-# USB-HDD auf Linux-Server unmounten
+# USB-HDD auf Linux-Server mounten
 #
-# $1 - mount point
+# $1 - device (ohne /dev/)
+# return moint point
 #
-umount_usb_device() {
-    local mount_point=$1
-
-    umount $mount_point >>$LOG_FILE 2>&1
+mount_usb_device_linux() {
+    log $DEBUG "$DBG mount_usb_device_linux( $@ )"
+    local device=$1
+    local mount_point=/var/mnt/backup
+    check_directory $mount_point
     if [ $? -ne 0 ]; then
-        echo "ERROR unmounting $mount_point"
+        mail_log $ERROR "$ERR mount point \"$mount_point\" does not exist."
         return 1
     fi
+    log $DEBUG "$DBG mount /dev/$device $mount_point"
+    mount /dev/$device $mount_point >>$LOG_FILE 2>&1
+    if [ $? -ne 0 ]; then
+        mail_log $ERROR "$ERR mounting /dev/$device failed."
+        return 1
+    fi
+    echo $mount_point
     return 0
 }
 
+# unmount USB-HDD
+#
+umount_usb_device() {
+    if is_synology; then
+        umount_usb_device_syno $1
+        return $?
+    else
+        umount_usb_device_linux $1
+        return $?
+    fi
+}
+
+# USB-HDD auf Synology-NAS unmounten
+#
+# $1 - device name
+#
+umount_usb_device_syno() {
+    local device=$1
+    log $DEBUG "$DBG umount_usb_device_syno( $@ )"
+    log $DEBUG "$DBG > $SYNO_USB -umount $device"
+    $SYNO_USB -umount $device >>$LOG_FILE 2>&1
+    return $?
+}
+
+# USB-HDD auf Linux-Server unmounten
+#
+# $1 - device (ohne /dev/)
+#
+umount_usb_device_linux() {
+    local device=/dev/$1
+    log $DEBUG "$DBG umount_usb_device_linux( $@ )"
+    log $DEBUG "$DBG > umount $device"
+    umount $device >>$LOG_FILE 2>&1
+    return $?
+}
+
 # USB-HDD suchen und Backup-Typ ermitteln
 #
 # Der Typ wird über eine Datei auf der USB-HDD festgelegt:
@@ -594,14 +710,14 @@ check_backup_device() {
 
     log $DEBUG "$DBG > ls $mount_point/${tagP1}*${tagP2} | wc -l"
     if [ "$(ls $mount_point/${tagP1}*${tagP2} 2>>$LOG_FILE | wc -l 2>>$LOG_FILE)" != "1" ]; then
-        mail_log $ERROR "$ERR no tag found on device at $mount_point"
+        mail_log $ERROR "$ERR no tag found on device at $mount_point."
         return 1
     fi
 
     log $DEBUG "$DBG > ls $mount_point/${tagP1}*${tagP2} | sed -E \"s/.*$tagP1(.*)$tagP2/\1/\""
     local tag=$(ls $mount_point/${tagP1}*${tagP2} 2>>$LOG_FILE | sed -E "s/.*$tagP1(.*)$tagP2/\1/" 2>>$LOG_FILE)
     if [ $? -ne 0 ]; then
-        mail_log $ERROR "$ERR no tag found on device at $mount_point"
+        mail_log $ERROR "$ERR no tag found on device at $mount_point."
         return 1
     fi
     echo $tag
@@ -615,34 +731,22 @@ check_backup_device() {
 #
 do_export() {
     log $DEBUG "$DBG do_export ()"
-    mail_log $INFO "$INF checking USB device"
+    mail_log $INFO "$INF checking USB device."
 
     # get device
-    log $DEBUG "$DBG > /usr/syno/bin/synousbdisk -enum | grep -v devices | wc -l"
-    if [ "$(/usr/syno/bin/synousbdisk -enum 2>>$LOG_FILE | grep -v devices 2>>$LOG_FILE | wc -l 2>>$LOG_FILE)" != "1" ]; then
-        mail_log $ERROR "$ERR no USB device or too many found @$HOST_NAME."
-        return 1
-    fi
-    log $DEBUG "$DBG > /usr/syno/bin/synousbdisk -enum | grep -v devices"
-    local device=$(/usr/syno/bin/synousbdisk -enum 2>>$LOG_FILE | grep -v devices 2>>$LOG_FILE)
-
-    # check if exfat
-    log $DEBUG "$DBG > /usr/syno/bin/synousbdisk -info $device | grep -i \"file system\" | sed -E \"s/.*:\s*(.*)\s*/\1/\""
-    local fs=$(/usr/syno/bin/synousbdisk -info $device 2>>$LOG_FILE | grep -i "file system" 2>>$LOG_FILE | sed -E "s/.*:\s*(.*)\s*/\1/" 2>>$LOG_FILE)
-    if [ "$fs" != "exfat" ]; then
-        mail_log $ERROR "$ERR device $device not exfat formatted"
+    local device=$(get_usb_device)
+    if [ -z $device ]; then
         return 1
     fi
 
-    # get mount point
-    log $DEBUG "$DBG > /usr/syno/bin/synousbdisk -info $device | grep -i \"mount path\" | sed -E \"s/.*:\s*(.*)\s*/\1/\""
-    local mount_path=$(/usr/syno/bin/synousbdisk -info $device 2>>$LOG_FILE | grep -i "mount path" 2>>$LOG_FILE | sed -E "s/.*:\s*(.*)\s*/\1/" 2>>$LOG_FILE)
-    if [ $? -ne 0 ] || [ ! -d $mount_path ]; then
-        mail_log $ERROR "$ERR mount point \"$mount_path\" does not exist."
+    # check if exfat | mount & get mount point
+    local mount_point=$(mount_usb_device $device)
+    if [ -z $mount_point ]; then
         return 1
     fi
-     
-    local backup_type=$(check_backup_device $mount_path)
+
+    # find export type
+    local backup_type=$(check_backup_device $mount_point)
     if [ -z $backup_type ]; then
         return 1
     fi
@@ -652,15 +756,27 @@ do_export() {
     case $backup_type in 
         int1|int2|1|2)
             # daily + weekly backups -> Auslagerung 1+2, Backup 1+2
-            source_path="/volume1/nfs/backups"
+            if is_synology; then
+                source_path="/volume1/nfs/backups"
+            else
+                source_path="/var/srv/nas/backups"
+            fi
             ;;
         serien)
             # Serien -> Auslagerung
-            source_path="/volume1/media/serien"
+            if is_synology; then
+                source_path="/volume1/media/serien"
+            else
+                source_path="/var/srv/media/serien"
+            fi
             ;;
         video)
             # Video -> Auslagerung
-            source_path="/volume1/media/video"
+            if is_synology; then
+                source_path="/volume1/media/video"
+            else
+                source_path="/var/srv/media/video"
+            fi
             ;;
         ?*)
             echo "ERROR unknown backup type $backup_type"
@@ -674,15 +790,14 @@ do_export() {
     mail_log $INFO ">>> log file    : $LOG_FILE"
     mail_log $INFO ">>> " 
 
-    mail_log $INFO "$INF exporting $source_path -> $mount_path"
-    log $DEBUG "$DBG rsync -rti --one-file-system --delete --stats --exclude=@eaDir $source_path $mount_path"
-    rsync -rti --one-file-system --delete --stats --exclude=@eaDir $source_path $mount_path >>$LOG_FILE 2>&1
+    mail_log $INFO "$INF exporting $source_path -> $mount_point"
+    log $DEBUG "$DBG rsync -rti --one-file-system --delete --stats --exclude=@eaDir $source_path $mount_point"
+    rsync -rti --one-file-system --delete --stats --exclude=@eaDir $source_path $mount_point >>$LOG_FILE 2>&1
     is_error $?
 
-    mail_log $INFO "$INF unmounting USB device"
-    log $DEBUG "$DBG > /usr/syno/bin/synousbdisk -umount $device"
-    /usr/syno/bin/synousbdisk -umount $device >>$LOG_FILE 2>&1
-    is_error $?
+    mail_log $INFO "$INF unmounting USB device $device."
+    umount_usb_device $device
+    is_error $? 
 
 }
 
diff --git a/main.sh b/main.sh
index 89be191..4464958 100755
--- a/main.sh
+++ b/main.sh
@@ -3,7 +3,7 @@
 # entrypoint for all actions
 #
 
-VER="2.0.1"
+VER="2.0.4"
 
 show_help() {
     echo "usage: $0 options"