diff --git a/src/snapshot/__pycache__/snap.cpython-39.pyc b/src/snapshot/__pycache__/snap.cpython-39.pyc
index 63db5eb..31f0d9d 100644
Binary files a/src/snapshot/__pycache__/snap.cpython-39.pyc and b/src/snapshot/__pycache__/snap.cpython-39.pyc differ
diff --git a/src/snapshot/snap.py b/src/snapshot/snap.py
index 67b8982..791cbf4 100644
--- a/src/snapshot/snap.py
+++ b/src/snapshot/snap.py
@@ -8,7 +8,7 @@ def dmpsnap(root_tree: str):
 def dcsnap(path: str, filename=None):
   return _dump.decode_snapshot(path, dump_file_name = filename)
 
-def diffsnap(last_tree, current_tree, path='./', removed=[], changed=[], added=[]):
+def diffsnap(last_tree, current_tree, path='./', bres={}):
   '''
     snapshot is a tree represented by dictionary {k, val} when k can be folder or file
     and val can be a dictionary or an hash
@@ -16,9 +16,9 @@ def diffsnap(last_tree, current_tree, path='./', removed=[], changed=[], added=[
     @param                 last_tree                 snapshot computed at time t0
     @param                 current_tree              snapshot computed at time t1
   '''
-  removed = []
-  changed = []
-  added = []
+  removed = bres.setdefault('removed', [])
+  changed = bres.setdefault('changed', [])
+  added = bres.setdefault('added', [])
 
   for name_last, hsh_last in last_tree.items():
     hsh_current = current_tree.get(name_last)
@@ -34,30 +34,33 @@ def diffsnap(last_tree, current_tree, path='./', removed=[], changed=[], added=[
     if hsh_current is None:
       ## the name in not founded in current snapshot - Subtree removed (or moved)
       print(f'{path}{name_last} present in last_tree but removed in current_tree, subtree {name_last} removed in current_tree')
-      removed.append(item.update({
+      item.update({
         'last_type' : 'dir',
-        }))
+        })
+      removed.append(item)
       continue
 
     current_type = 'dir' if isinstance(hsh_current, dict) else 'file'
 
     if type(hsh_last) != type(hsh_current):
       print(f'{path}{name_last} changed his type in {current_type}')
-      changed.append(item.update({
+      item.update({
         'last_type' : last_type,
         'current_type' : current_type,
-        }))
+      })
+      changed.append(item)
       continue
 
     if isinstance(hsh_last, str):
       if hsh_last != hsh_current:
         print(f'file {path}{name_last} changed his hash')
-        changed.append(item.update({
+        item.update({
           'last_type' : last_type,
           'current_type' : current_type,
           'last_hash' : hsh_last,
           'cur_hash' : hsh_current,
-          }))
+        })
+        changed.append(item)
       continue
 
     # name is dir
@@ -71,8 +74,18 @@ def diffsnap(last_tree, current_tree, path='./', removed=[], changed=[], added=[
     if keys_added:
       for key_added in keys_added:
         print(f'file {path}{name_last}/{key_added} subtree added in current snapshot')
+        item.update({
+          'name' : key_added,
+          'path' : '%s%s' % (path, name_last),
+          'current_type' : 'dir' if isinstance(current_tree[name_last][key_added], dict) else 'file'
+        })
+        added.append(item)
 
-    diffsnap(hsh_last, hsh_current, path='%s%s/' % (path,name_last))
+    diffsnap(hsh_last, hsh_current, path='%s%s/' % (path,name_last), bres = {
+      'removed' : removed,
+      'added' :  added,
+      'changed' : changed,
+      })
 
 def findsubtree(snapshot, subtree, path='./'):
   '''