diff --git a/.idea/modules/app/app.iml b/.idea/modules/app/app.iml
index 3a0f669..f5481e4 100755
--- a/.idea/modules/app/app.iml
+++ b/.idea/modules/app/app.iml
@@ -78,6 +78,7 @@
       <sourceFolder url="file://$MODULE_DIR$/../../../app/src/test/shaders" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/assets" />
       <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/blame" />
+      <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/builds" />
       <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/bundles" />
       <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/classes" />
       <excludeFolder url="file://$MODULE_DIR$/../../../app/build/intermediates/classes-proguard" />
diff --git a/app/src/main/java/com/ericsson/uecontrol/core/behaviour/UeBehaviourFtpUpload.java b/app/src/main/java/com/ericsson/uecontrol/core/behaviour/UeBehaviourFtpUpload.java
index b5e9f0b..a3fb401 100755
--- a/app/src/main/java/com/ericsson/uecontrol/core/behaviour/UeBehaviourFtpUpload.java
+++ b/app/src/main/java/com/ericsson/uecontrol/core/behaviour/UeBehaviourFtpUpload.java
@@ -16,7 +16,7 @@ import java.util.regex.Pattern;
  */
 public class UeBehaviourFtpUpload extends UeBehaviourFtp {
     private static final Logger log = Logger.getLogger(UeBehaviourFtpUpload.class);
-    private static final int BUFFER_SIZE = 512;
+    private static final int BUFFER_SIZE = 8192;
 
 
     @Configurable(order=1, value="Host")
@@ -38,8 +38,8 @@ public class UeBehaviourFtpUpload extends UeBehaviourFtp {
         if (outStream != null) {
             OutputStream out = new BufferedOutputStream(outStream);
 
-            if(sizeOrFile != null && Pattern.matches("\\d*", sizeOrFile)){
-                int size = Integer.parseInt(sizeOrFile);
+            if(isLong(sizeOrFile)){
+                long size = Long.parseLong(sizeOrFile);
                 uploadRandomData(out, size);
             }
             else{
@@ -55,13 +55,13 @@ public class UeBehaviourFtpUpload extends UeBehaviourFtp {
         }
     }
 
-    private void uploadRandomData(OutputStream out, int size) throws IOException {
+    private void uploadRandomData(OutputStream out, long size) throws IOException {
         // Upload data
         log.debug("Uploading random data with size "+size);
-        int total = 0;
+        long total = 0;
         byte[] data = new byte[BUFFER_SIZE];
         while (total < size && !stopExecution()) {
-            int writeLength = (total + data.length < size ? data.length : size - total);
+            int writeLength = (int)(total + data.length < size ? data.length : size - total);
             out.write(data, 0, writeLength);
 
             total += writeLength;
@@ -109,11 +109,19 @@ public class UeBehaviourFtpUpload extends UeBehaviourFtp {
 
     @Override
     public String toString() {
-        if(sizeOrFile != null && Pattern.matches("\\d*", sizeOrFile)){
-            int size = Integer.parseInt(sizeOrFile);
-            return "Will upload "+ StringUtil.getByteString(size) +" of random data.";
+        if (sizeOrFile != null) {
+            if (isLong(sizeOrFile)) {
+                long size = Long.parseLong(sizeOrFile);
+                return "Will upload " + StringUtil.getByteString(size) + " of random data.";
+            }
+            else
+                return "Will upload local file " + sizeOrFile;
         }
-        return "Will upload local file "+ sizeOrFile;
+        else
+            return "No file specified";
     }
 
+    private boolean isLong(String str){
+        return sizeOrFile != null && Pattern.matches("\\d{1,19}", str);
+    }
 }