diff --git a/build/deploy-ftp.sh b/build/deploy-ftp.sh
index 82ed067a3..894253f2d 100644
--- a/build/deploy-ftp.sh
+++ b/build/deploy-ftp.sh
@@ -18,12 +18,44 @@ echo "login $USER"          >> "$NETRC"
 echo "password $FTP_SECRET" >> "$NETRC"
 chmod 600 "$NETRC"
 
-upload_file(){
-    (cd out; tar czf $EMULATOR.tgz $EMULATOR)
+# create_archive will create a tar ball from the out folder 
+# try to extract it to see if it is valid
+# retry 3 times then fail
+create_archive() {
+    MAX_RETRIES=3
+    RETRY_COUNT=0
 
-    echo "Deploying as $USER at $HOST"
+    while [ "$RETRY_COUNT" -lt "$MAX_RETRIES" ]; do
+        (cd out; tar czf $EMULATOR.tgz $EMULATOR)
 
-    ftp "$HOST" <<EOF
+        # Verify the tarball
+        if tar tf $EMULATOR.tgz >/dev/null 2>&1; then
+            echo "Tarball is valid and can be expanded."
+            break
+        else
+            echo "Tarball is not valid or cannot be expanded. Retrying..."
+            RETRY_COUNT=`expr "$RETRY_COUNT" + 1`
+            rm -f $EMULATOR.tgz
+            continue
+        fi
+    done
+
+    if [ "$RETRY_COUNT" = "$MAX_RETRIES" ]; then
+        echo "Failed to create a valid tarball after $MAX_RETRIES attempts."
+        return 1
+    fi
+}
+
+# upload_file tries to upload the tar ball to the FTP server, will retry 5 times and then fail
+upload_file() {
+    MAX_RETRIES=5
+    RETRY_COUNT=0
+
+    while [ "$RETRY_COUNT" -lt "$MAX_RETRIES" ]; do
+        echo "Deploying as $USER at $HOST"
+
+        # Attempt to upload the file
+        if ftp "$HOST" <<EOF
 passive on
 type image
 cd $DIR
@@ -31,9 +63,24 @@ lcd out
 put $EMULATOR.tgz
 bye
 EOF
+        then
+            echo "Upload successful."
+            break
+        else
+            echo "Upload failed. Retrying..."
+            RETRY_COUNT=`expr "$RETRY_COUNT" + 1`
+        fi
+    done
+
+    if [ "$RETRY_COUNT" = "$MAX_RETRIES" ]; then
+        echo "Failed to upload the file after $MAX_RETRIES attempts."
+        return 1
+    fi
 }
 
-test_archive_integrity(){
+# test_archive_integrity will download the tarball after successful upload and verify its integrity 
+# by binary comparing the contents of the source folder and the expanded folder
+test_archive_integrity() {
     echo "Testing download of $EMULATOR.tgz"
     mkdir -p "$TESTDIR"
     cd "$TESTDIR"
@@ -78,15 +125,16 @@ test_archive_integrity(){
     fi
 }
 
-
+# main loop
 while [ $retry_count -lt $RETRY_LIMIT ]; do
+    create_archive
     upload_file
     if test_archive_integrity; then
         echo "File integrity verified successfully."
         exit 0
     else
-        echo "File integrity verification failed, retrying... ($((retry_count+1))/$RETRY_LIMIT)"
-        retry_count=$((retry_count+1))
+        echo "File integrity verification failed, retrying... (`expr "$retry_count" + 1`/$RETRY_LIMIT)"
+        retry_count=`expr "$retry_count" + 1`
     fi
 done