diff --git a/backup_new.sh b/backup_new.sh
index 8e791a4..fec6e46 100755
--- a/backup_new.sh
+++ b/backup_new.sh
@@ -249,6 +249,24 @@ if [ $use503 -eq 1 ]; then
     printf "${cyan}[%s] -- [INFO] Using 503 functionality --${norm}\n" \
         "$(stamp)" >> "$logFile"
 fi
+# seafile directories
+if [ ! -d "$seafDir" ]; then
+    badParam dne "(--seafdir default)" "$seafDir"
+elif [ ! -d "$seafData" ]; then
+    badParam dne "(--seafdata default)" "$seafData"
+fi
+# offline backup
+if [ $offlineBackup -eq 1 ]; then
+    if ! systemctl list-unit-files | \
+        grep -Eq "^$seafService |^$seafService.service"
+        then
+        badParam svc "(--seafile-service default)" "$seafService"
+    elif ! systemctl list-unit-files | \
+        grep -Eq "^$seafHub |^$seafHub.service"
+        then
+        badParam svc "(--seahub-service default)" "$seafHub"
+    fi
+fi
 
 
 ### start logging