diff --git a/docs/download.md b/docs/download.md
index 20c2ca3..5f48b28 100644
--- a/docs/download.md
+++ b/docs/download.md
@@ -2,7 +2,10 @@
 
 ### Debian Jessie
 
-[![Debian Jessie](/img/os/debian2.png)](https://cdn.kobol.io/files/Helios4_Debian_Jessie_4.4.96.img.xz)
+[![Debian Jessie](/img/os/debian2.png)](https://cdn.kobol.io/files/Helios4_Debian_Jessie_4.4.96.img.xz)<br>
+*Build date : 09/11/1017<br>
+MD5SUM : ccb4f043ac74cd87e2f2ed764f25381d*
+
 
 ### Debian Strech
 
@@ -10,7 +13,10 @@
 
 ### OpenMediaVault
 
-[![OMV](/img/os/omv.png)](https://cdn.kobol.io/files/Helios4_Debian_Jessie_4.4.96-OMV_3.0.91.img.xz)
+[![OMV](/img/os/omv.png)](https://cdn.kobol.io/files/Helios4_Debian_Jessie_4.4.96-OMV_3.0.91.img.xz)<br>
+
+*Build date : 09/11/1017<br>
+MD5SUM : db76e9cfaa362b73d8840a0eacaa70c8*
 
 ### Syncloud
 
diff --git a/docs/hardware.md b/docs/hardware.md
index efa02fd..0914105 100644
--- a/docs/hardware.md
+++ b/docs/hardware.md
@@ -1,9 +1,13 @@
 !!! info
     Wiki edition in progress
 
+## Block Diagram
+
+![Block Diagram](/img/hardware/block_diagram.jpg)
+
 ## Connector / Interface List
 
-![Board Legend](/img/hardware/board_legend.png)
+![Board Legend](/img/hardware/board_legend.jpg)
 
 Name |Peripheral Type|Connector Type|Details
 -----|---------------|--------------|-------
diff --git a/docs/img/hardware/block_diagram.jpg b/docs/img/hardware/block_diagram.jpg
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diff --git a/docs/img/install/recommended_sdcard.jpg b/docs/img/install/recommended_sdcard.jpg
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diff --git a/docs/install.md b/docs/install.md
index c76d989..1be66d8 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -6,12 +6,14 @@
 
 ## **What you need before your start.**
 
-You need any SDcard UHS-I with minimum of 8GB. Ideally Speed Class 3.
+You need a microSD card UHS-I with a minimum of 8GB. Ideally Speed Class 3.
 
 We recommend the following models :
 
-- Samsung Evo Pro 16GB
-- SanDisk Extreme Pro 16GB
+- Samsung Evo Pro+ 32GB
+- SanDisk Extreme Pro 32GB
+
+![Recommended SDcard](/img/install/recommended_sdcard.jpg)
 
 ## **Step 1** - Download an Helios4 OS image