diff --git a/client-gui/src/gui_app.rs b/client-gui/src/gui_app.rs
index c42aa48..3e380aa 100644
--- a/client-gui/src/gui_app.rs
+++ b/client-gui/src/gui_app.rs
@@ -1,7 +1,7 @@
 use client_network::{
     ChunkNode, MerkleNode, MerkleTree, NetworkCommand, NetworkEvent, NodeHash,
     big_or_chunk_to_file, filename_to_string, generate_base_tree, node_hash_to_hex_string,
-    remove_null_bytes,
+    node_to_file, remove_null_bytes,
 };
 use crossbeam_channel::{Receiver, Sender};
 use egui::{
@@ -258,10 +258,11 @@ impl eframe::App for P2PClientApp {
                     self.loading_peers.retain(|s| s != peer_username.as_str());
                     self.show_error(err, peer_username);
                 }
-                NetworkEvent::InitDownload(hash, ip) => {
+                NetworkEvent::InitDownload(hash, ip, name) => {
                     if let Some(addr) = &self.active_peer {
                         if let Some(roottree) = self.loaded_fs.get(addr) {
                             if let Some(root) = roottree.data.get(&hash) {
+                                self.root_downloading_file = name;
                                 let _ = self
                                     .current_downloading_file_map
                                     .data
@@ -299,6 +300,29 @@ impl eframe::App for P2PClientApp {
                         _ => {}
                     }
                     if self.remaining_chunks.is_empty() {
+                        /*let file = OpenOptions::new()
+                            .append(true)
+                            .create(true)
+                            .open(self.root_downloading_file.clone());
+
+                        if let Some(current) = self
+                            .current_downloading_file_map
+                            .data
+                            .get(&self.current_downloading_file_map.root)
+                        {
+                            match file {
+                                Ok(mut fileok) => {
+                                    big_or_chunk_to_file(
+                                        &self.current_downloading_file_map,
+                                        current,
+                                        &mut fileok,
+                                    );
+                                }
+                                Err(e) => {
+                                    eprintln!("error creaation file: {}", e);
+                                }
+                            }
+                        }*/
                         println!("bigfile téléchargé");
                     }
                 }
@@ -797,10 +821,16 @@ impl P2PClientApp {
                         .on_hover_text("Click to request file chunks...")
                         .clicked()
                     {
-                        if let Some(addr) = &self.active_peer {
-                            let _ = self
-                                .network_cmd_tx
-                                .send(NetworkCommand::InitDownload(to_draw, addr.clone()));
+                        if let Some(name) = filename {
+                            if let Ok(nameb) = String::from_utf8(name.to_vec()) {
+                                if let Some(addr) = &self.active_peer {
+                                    let _ = self.network_cmd_tx.send(NetworkCommand::InitDownload(
+                                        to_draw,
+                                        addr.clone(),
+                                        nameb,
+                                    ));
+                                }
+                            }
                         }
                     }
                 }
diff --git a/client-network/src/data.rs b/client-network/src/data.rs
index 8729574..7daf4fb 100644
--- a/client-network/src/data.rs
+++ b/client-network/src/data.rs
@@ -154,8 +154,8 @@ impl MerkleNode {
         match self {
             MerkleNode::Chunk(_) => 0,
             MerkleNode::Directory(_) => 1,
-            MerkleNode::Big(_) => 3,
-            MerkleNode::BigDirectory(_) => 4,
+            MerkleNode::Big(_) => 2,
+            MerkleNode::BigDirectory(_) => 3,
         }
     }
 
diff --git a/client-network/src/datum_parsing.rs b/client-network/src/datum_parsing.rs
index 84e456d..13aca63 100644
--- a/client-network/src/datum_parsing.rs
+++ b/client-network/src/datum_parsing.rs
@@ -11,7 +11,7 @@ pub fn parse_received_datum(
     datum_length: usize,
 ) -> Option<([u8; 32], MerkleNode)> {
     let hash_name: [u8; 32] = recevied_datum[..32].try_into().expect("error");
-    let value = &recevied_datum[32..datum_length];
+    let value = &recevied_datum[32..recevied_datum.len()];
     let value_slice = value.to_vec();
     println!("valueslice: {:?}, {}", value_slice, value_slice.len());
     let datum_type = value_slice[0];
@@ -49,12 +49,22 @@ pub fn parse_received_datum(
             }
         }
         BIG => {
+            let mut bigdir_entries: Vec<NodeHash> = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..((value_slice.len() - 1) / 32) as u8 {
+                offset = (1 + 32 * i as usize) as usize;
+                println!("offset:{}, i:{}", offset, i);
+                let hash = &value_slice[offset..offset + 32];
+
+                // envoyer un datum request
+                bigdir_entries.push(hash.try_into().expect("incorrect size"));
+            }
+
             println!("its a BIG bro");
-            let chlidren: Vec<NodeHash> = Vec::new();
             Some((
                 hash_name,
                 MerkleNode::Big(crate::BigNode {
-                    children_hashes: chlidren,
+                    children_hashes: bigdir_entries,
                 }),
             ))
         }
diff --git a/client-network/src/lib.rs b/client-network/src/lib.rs
index fefb9de..d4d80b2 100644
--- a/client-network/src/lib.rs
+++ b/client-network/src/lib.rs
@@ -185,7 +185,7 @@ pub enum NetworkCommand {
     SendDatum(MerkleNode, [u8; 32], String),
     SendNoDatum(Vec<u8>, String),
     SendRootReply(Vec<u8>, String),
-    InitDownload([u8; 32], String),
+    InitDownload([u8; 32], String, String),
     // ...
 }
 
@@ -205,7 +205,7 @@ pub enum NetworkEvent {
     ServerHandshakeFailed(String),
     DatumRequest([u8; 32], String),
     RootRequest(String),
-    InitDownload([u8; 32], String),
+    InitDownload([u8; 32], String, String),
     // ...
 }
 
@@ -246,11 +246,14 @@ pub fn start_p2p_executor(
             // Check for commands from the GUI
             if let Ok(cmd) = cmd_rx.try_recv() {
                 match cmd {
-                    NetworkCommand::InitDownload(hash, ip) => {
+                    NetworkCommand::InitDownload(hash, ip, name) => {
                         if let Some(sd) = shared_data.as_ref() {
                             if let Some(res) = sd.handshake_peers.get_peer_info_username(ip) {
-                                let _ = event_tx
-                                    .send(NetworkEvent::InitDownload(hash, res.ip.to_string()));
+                                let _ = event_tx.send(NetworkEvent::InitDownload(
+                                    hash,
+                                    res.ip.to_string(),
+                                    name.to_string(),
+                                ));
                             }
                         }
                     }
diff --git a/client-network/src/message_handling.rs b/client-network/src/message_handling.rs
index 149322f..96a41db 100644
--- a/client-network/src/message_handling.rs
+++ b/client-network/src/message_handling.rs
@@ -475,6 +475,7 @@ pub fn parse_message(
                                 .try_into()
                                 .expect("incorrect size"),
                         );
+                        println!("received length:{}", received_length);
                         let received_datum = &received_message[LENGTH..];
                         let parsed_node =
                             parse_received_datum(received_datum.to_vec(), received_length as usize);