diff --git a/docs/platforms/espressif_extra.rst b/docs/platforms/espressif_extra.rst
index 99a1a778..8753d80f 100644
--- a/docs/platforms/espressif_extra.rst
+++ b/docs/platforms/espressif_extra.rst
@@ -62,7 +62,7 @@ Uploading files to file system SPIFFS
     Please make sure to read `ESP8266 Flash layout <https://github.com/esp8266/Arduino/blob/master/doc/filesystem.md#flash-layout>`_
     information first.
 
-1. Put files to :ref:`projectconf_pio_data_dir`
+1. Create :ref:`projectconf_pio_data_dir` and put files here
 2. Run target ``uploadfs`` via  :option:`platformio run --target` command.
 
 By default, will be used default LD Script for the board where is specified
diff --git a/platformio/__init__.py b/platformio/__init__.py
index 621eba82..73855fed 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,7 +14,7 @@
 
 import sys
 
-VERSION = (2, 7, "0.dev3")
+VERSION = (2, 7, "0.dev4")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"
diff --git a/platformio/builder/scripts/espressif.py b/platformio/builder/scripts/espressif.py
index f1464262..d73d6ddd 100644
--- a/platformio/builder/scripts/espressif.py
+++ b/platformio/builder/scripts/espressif.py
@@ -116,7 +116,7 @@ env.Replace(
     ],
     UPLOADERFSFLAGS=[
         "$UPLOADERFLAGS",
-        "-ca", "${int(SPIFFS_START, 16)}"
+        "-ca", "${int(SPIFFS_START, 16) & 0xFFFFFF}"
     ],
     UPLOADEROTAFLAGS=[
         "--debug",