diff --git a/backup.sh b/backup.sh
index ebc28a8..7a49cd0 100644
--- a/backup.sh
+++ b/backup.sh
@@ -14,4 +14,36 @@ cp -r ${PLEROMA_PATH}/uploads ${BACKUP_PATH}
 echo "3.copy config file"
 cp ${PLEROMA_CONFIG_PATH} ${BACKUP_PATH}
 
+echo "————————————upload to remote——————————"
+echo "4.backup to remote"
+/usr/bin/expect <<EOF
+    set time 30
+    spawn duplicacy backup -threads 4
+    expect {
+        "ID" { send "$ACCESS_KEY_ID\n"; exp_continue }
+        "Secret" { send "$SECRET_ACCESS_KEY\n"; exp_continue }
+        "password" { send "$PASSWORD\n" }
+    }
+    expect eof
+EOF
+
 echo `date +"%Y-%m-%d %H:%M:%S"` " done!"
+
+# 5. (optional)Keep a revision every 7 days for revisions older than 30 days 
+# echo "5.prune snapshot"
+# /usr/bin/expect <<EOF
+#     set time 30
+#     spawn duplicacy backup -threads 4
+#     expect {
+#         "ID" { send "$ACCESS_KEY_ID\n"; exp_continue }
+#         "Secret" { send "$SECRET_ACCESS_KEY\n"; exp_continue }
+#         "password" { send "$PASSWORD\n" }
+#     }
+#     spawn duplicacy prune -keep 7:30
+#     expect {
+#         "ID" { send "$ACCESS_KEY_ID\n"; exp_continue }
+#         "Secret" { send "$SECRET_ACCESS_KEY\n"; exp_continue }
+#         "password" { send "$PASSWORD\n" }
+#     }
+#     expect eof
+# EOF