diff --git a/src/main/java/org/gcube/portlets/user/shareupdates/client/view/Placeholder.java b/src/main/java/org/gcube/portlets/user/shareupdates/client/view/Placeholder.java
index c07f980..feac727 100644
--- a/src/main/java/org/gcube/portlets/user/shareupdates/client/view/Placeholder.java
+++ b/src/main/java/org/gcube/portlets/user/shareupdates/client/view/Placeholder.java
@@ -40,5 +40,4 @@ public class Placeholder extends FlowPanel {
 			add((Widget)atPrev);
 		}
 	}
-
 }
diff --git a/src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.java b/src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.java
index cd742e9..234c978 100644
--- a/src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.java
+++ b/src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.java
@@ -315,6 +315,7 @@ public class ShareUpdateForm extends Composite {
 		up.setVisible(false);
 		fileBrowse(up.getElement());
 		uploadProgress.setVisible(true);
+		attachButton.setEnabled(false);
 
 	}
 
@@ -497,6 +498,8 @@ public class ShareUpdateForm extends Composite {
 
 				@Override
 				public void onSuccess(ClientFeed feed) {
+					
+					//GWT.log("Saved feed looks like " + feed.toString());
 
 					submitButton.setEnabled(true);
 					shareTextArea.setEnabled(true);
@@ -668,6 +671,9 @@ public class ShareUpdateForm extends Composite {
 
 				// enable anyway the button
 				submitButton.setEnabled(true);
+				
+				// enable attach button
+				attachButton.setEnabled(true);
 			}
 
 			// it returns a LinkPreview (for compatibility with old code)
@@ -690,6 +696,9 @@ public class ShareUpdateForm extends Composite {
 
 				addPreviewAttachment(result, atPrev);	
 				submitButton.setEnabled(true);
+				
+				// enable attach button
+				attachButton.setEnabled(true);
 			}
 		});
 	}
diff --git a/src/main/java/org/gcube/portlets/user/shareupdates/server/ShareUpdateServiceImpl.java b/src/main/java/org/gcube/portlets/user/shareupdates/server/ShareUpdateServiceImpl.java
index 00a2ef7..e424fb2 100644
--- a/src/main/java/org/gcube/portlets/user/shareupdates/server/ShareUpdateServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/shareupdates/server/ShareUpdateServiceImpl.java
@@ -323,7 +323,7 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 				firstAttachmentDescription = "", 
 				firstAttachmentFormat = "", 
 				firstAttachmentDownloadUrl = "", 
-				firstAttachmenturlThumbnail = "null";
+				firstAttachmenturlThumbnail = "";
 
 		if(uploadedFiles.size() > 0){
 
@@ -343,17 +343,18 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 
 								attachments = new ArrayList<>();
 
+								// starting from 1
 								for (int i = 1; i < uploadedFiles.size(); i++){
 									UploadedFile file = uploadedFiles.get(i);
-									
+
 									attachments.add(new Attachment(
 											UUID.randomUUID().toString(), 
 											file.getDownloadUrl(), 
 											file.getFileName(), 
 											file.getDescription(), 
-											file.getThumbnailUrl() == null ? "null" : file.getThumbnailUrl(), 
+											file.getThumbnailUrl(), 
 											file.getFormat())
-									);
+											);
 								}
 							}
 
@@ -542,20 +543,25 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 
 		String httpURL = "";
 		String smpURI = "";
+		String mimeType = null;
 		if (isWithinPortal()) {
 			//get the url to show, before actually uploading it
-			smpURI = storageClient.getUrl(true).RFile(remoteFilePath); //"http://ciccio.com";
+			//smpURI = storageClient.getUrl(true).RFile(remoteFilePath); //"http://ciccio.com";
+			smpURI = storageClient.getHttpUrl(true).RFile(remoteFilePath);
 
-			//The storage uploader Thread starts here asyncronously
-			Thread thread = new Thread(new UploadToStorageThread(storageClient, fileName, fileabsolutePathOnServer, remoteFilePath));
+			//The storage uploader Thread starts here asyncronouslyù
+			try {
+				mimeType = FilePreviewer.getMimeType(new File(fileabsolutePathOnServer), fileName);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+			Thread thread = new Thread(new UploadToStorageThread(storageClient, fileName, fileabsolutePathOnServer, remoteFilePath, mimeType));
 			thread.start();
 		}
 
 		try {
-			String mimeType = FilePreviewer.getMimeType(new File(fileabsolutePathOnServer), fileName);
-			UriResolverReaderParameter resolver = new UriResolverReaderParameter(); 
 			//get the url to show (though it could not be ready for download at this stage)
-			httpURL = resolver.resolveAsUriRequest(smpURI, fileName, mimeType, true);
+			httpURL = smpURI;
 
 			switch (mimeType) {
 			case "application/pdf":
diff --git a/src/main/java/org/gcube/portlets/user/shareupdates/server/UploadToStorageThread.java b/src/main/java/org/gcube/portlets/user/shareupdates/server/UploadToStorageThread.java
index 803e9dc..1591dba 100644
--- a/src/main/java/org/gcube/portlets/user/shareupdates/server/UploadToStorageThread.java
+++ b/src/main/java/org/gcube/portlets/user/shareupdates/server/UploadToStorageThread.java
@@ -26,22 +26,27 @@ public class UploadToStorageThread implements Runnable {
 	private String fileabsolutePathOnServer;
 
 	private IClient sClient;
+
+	// type of file
+	private String mimeType;
 	/**
 	 * 
 	 * @param sClient the instance of the storage client
+	 * @param mimeType 
 	 * @param fileToUpload the absolute path of the file
 	 */
-	public UploadToStorageThread(IClient sClient, String fileName, String fileabsolutePathOnServer, String remoteFilePath) {
+	public UploadToStorageThread(IClient sClient, String fileName, String fileabsolutePathOnServer, String remoteFilePath, String mimeType) {
 		super();
 		this.sClient = sClient;
 		this.remoteFilePath = remoteFilePath;
 		this.fileName = fileName;
 		this.fileabsolutePathOnServer = fileabsolutePathOnServer;
+		this.mimeType = mimeType;
 	}
 
 	@Override
 	public void run() {
-		String theID = sClient.put(true).LFile(fileabsolutePathOnServer).RFile(remoteFilePath);
+		String theID = sClient.put(true, mimeType).LFile(fileabsolutePathOnServer).RFile(remoteFilePath);
 		_log.debug("Uploaded " + fileName + " - Returned Storage id=" + theID);
 	}