diff --git a/README.md b/README.md
index 041ce65..e76e9f6 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@
 - ACCOUNT_ID - логин в хранилище
 - APPLICATION_KEY - пароль в хранилище
 
+доп параметры:
+ - CHUNK_SIZE - размер одного чанка при заливке больших файлов (по дефолту 15 Мб)
+
 ##### Автор
 - **Vassiliy Yegorov** - *Initial work* - [vasyakrg](https://github.com/vasyakrg)
 - [сайт](vk.com/realmanual)
diff --git a/assets/usr/local/sbin/storage/s3.sh b/assets/usr/local/sbin/storage/s3.sh
index cc3af7c..f01ed5b 100644
--- a/assets/usr/local/sbin/storage/s3.sh
+++ b/assets/usr/local/sbin/storage/s3.sh
@@ -47,7 +47,6 @@ storage_upload() {
     [ -z ${S3_CONNECTION} ] && storage_login
 
     log "Upload \"${ARCHIVE}\" \n\t as \"${S3_ARCHIVE}\" in \"${S3_BUCKET}\""
-    s3cmd put ${ARCHIVE} s3://${S3_BUCKET}/${S3_ARCHIVE}
-
+    s3cmd put --multipart-chunk-size-mb=${CHUNK_SIZE:-15} ${ARCHIVE} s3://${S3_BUCKET}/${S3_ARCHIVE}
     return $?
 }