diff --git a/handlers/fileHandlers.js b/handlers/fileHandlers.js
index ade6199..8e000bc 100644
--- a/handlers/fileHandlers.js
+++ b/handlers/fileHandlers.js
@@ -1,17 +1,17 @@
 const fs = require('fs').promises;
 const uuid = require("uuid");
-var file_prefix = process.env.file_prefix;
 
 // write a file containing the request body
 function writeFile(path, prefix) {
   return function(req, res, next) {
-    if (file_prefix){
-      prefix = file_prefix + "_" + prefix;
-    }
-    let fn = prefix + "_" + uuid.v4() + ".json";
+
     const json = JSON.parse(req.body);
     json.create_date = new Date();
     req.body = JSON.stringify(json);
+    if (json.batch){
+      prefix = json.batch + "_" + prefix;
+    }
+    let fn = prefix + "_" + uuid.v4() + ".json";
     fs.writeFile(path + fn, req.body).then(()=>next()).catch((e) => next(e));
   };
 };