diff --git a/.gitignore b/.gitignore
index df3e73224c24471b1a4875c4249b668adcd6607a..a8d45a5b90ee9e3fc526ac190b356efaefa6b274 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 /.idea/workspace.xml
 /.idea/libraries
 /.idea/codeStyles/
+.idea
 .DS_Store
 /build
 /captures
diff --git a/app/src/main/java/foundation/e/drive/operations/ListFileRemoteOperation.java b/app/src/main/java/foundation/e/drive/operations/ListFileRemoteOperation.java
index 03d6b70686b5b6bdba01194868c1985bedd9e9a6..ffde62e895fbb87477aaed727c39cc5784a376cf 100644
--- a/app/src/main/java/foundation/e/drive/operations/ListFileRemoteOperation.java
+++ b/app/src/main/java/foundation/e/drive/operations/ListFileRemoteOperation.java
@@ -155,6 +155,13 @@ public class ListFileRemoteOperation extends RemoteOperation {
                 Log.w(TAG, "LightReadFolderRemoteOperation failed : http " + result.getHttpCode() + ", " + result.getLogMessage()+" => Ignored");
             }
 
+
+            try{
+                Thread.sleep(150);
+            }catch(InterruptedException e){
+                Log.w(TAG, "listFileRemoteOperation's sleep had been interrupted");
+            }
+
         } //End of loop
         finalResult = new RemoteOperationResult(RemoteOperationResult.ResultCode.OK);
 
diff --git a/app/src/main/java/foundation/e/drive/services/ObserverService.java b/app/src/main/java/foundation/e/drive/services/ObserverService.java
index bca4232fbf7a1cd2e4f580033ae7560b85e02327..0cadf83c6381f3af6a8f861c12b9b59a78716d9b 100644
--- a/app/src/main/java/foundation/e/drive/services/ObserverService.java
+++ b/app/src/main/java/foundation/e/drive/services/ObserverService.java
@@ -62,7 +62,7 @@ import static foundation.e.drive.utils.AppConstants.INITIALIZATION_HAS_BEEN_DONE
  */
 public class ObserverService extends Service implements OnRemoteOperationListener{
     private final static String TAG = ObserverService.class.getSimpleName();
-    private final static int INTERSYNC_MINIMUM_DELAY = 300000; // min delay between two sync in ms.
+    private final static int INTERSYNC_MINIMUM_DELAY = 900000; // min delay between two sync in ms.
 
     private List<SyncedFolder> mSyncedFolders; //List of synced folder
     private boolean isWorking = false;