diff --git a/edit_backup.py b/edit_backup.py
new file mode 100644
index 0000000..f244678
--- /dev/null
+++ b/edit_backup.py
@@ -0,0 +1,68 @@
+import json
+import sys
+
+class newJSON() :
+    def __init__(
+        self,
+        old_type,
+        old_address,
+        old_date,
+        old_dateSent,
+        old_read,
+        old_status,
+        old_body,
+        old_locked,
+        old_subId,
+    ) :
+        self.subscriptionId = old_subId
+        self.address = old_address
+        self.body = old_body
+        self.date = old_date
+        self.dateSent = old_dateSent
+        self.locked = 1 if old_locked else 0
+        self.protocol = None
+        self.read = 1 if old_read else 0
+        self.status = old_status
+        self.type = old_type
+        self.serviceCenter = None
+        self.backupType = "sms"
+
+def formatMsg(oldMsgJSON) :
+    return newJSON(
+        oldMsgJSON["type"],
+        oldMsgJSON["address"],
+        oldMsgJSON["date"],
+        oldMsgJSON["dateSent"],
+        oldMsgJSON["read"],
+        oldMsgJSON["status"],
+        oldMsgJSON["body"],
+        oldMsgJSON["locked"],
+        oldMsgJSON["subId"],
+    ).__dict__
+
+def appendToBck(old_path : str,new_path : str,target_path : str) :
+    # Load old backup 
+    with open(old_path) as file :
+        old_data = json.load(file)
+    # Load new backup
+    with open(new_path) as file :
+        target = json.load(file)
+    for msg in old_data["messages"] :
+        if msg["body"] != "" :
+            target.append(formatMsg(msg))
+    # Write to target
+    with open(target_path,"w") as file :
+        json.dump(target,file,indent=2)  
+
+def main() :
+    if len(sys.argv) != 4 :
+        print(
+            "Unrecognized arguments :\n",
+            "python3 edit_backup.py ./backup.json ./new_backup.json ./new.json"
+        )
+        sys.exit(1)
+    appendToBck(sys.argv[1],sys.argv[2],sys.argv[3])
+    sys.exit(0)
+
+if __name__ == "__main__" :
+    main() 
\ No newline at end of file