diff --git a/next.py b/next.py
index d6ce19c..8e8a9f8 100644
--- a/next.py
+++ b/next.py
@@ -9,11 +9,15 @@
 # TODO: inode_id -> actuall Inode lookup table
 # TODO: Add chareable folders:
 #   TODO: No more 'tokens' -> write-key for address-gen and read-key for encryption
-#   TODO: Change iota receive adress to next adress (encrypted with read-key)
+#   TODO: Change iota receive address to last adress (encrypted using read-key + hashed)
+#         -> relation of different transactions as part of the file/dir-structore stays hidden;
+#            but someone with the read-key of a directory/file is able to traverse the associated blockchain one by one
 #   TODO: Add share-functionality:
 #       1. publish read-key of the directory
 #       2. publish public adress of current milestone-block
 #       Problem: No updateable milestone-index... -> Create share-genesis?
+#       Problem: When sharing a single file, updates are not received... -> new file-blobs reverence old one via rec-address
+# TODO: ? Switch to salsa20 stream-cipher -> no padding required -> 2187 as blocksize instead of 2176 -> .5% more
 
 from iota import Iota, ProposedTransaction, Address, TryteString, Tag
 from iota.crypto.addresses import AddressGenerator
@@ -27,11 +31,9 @@ import math
 from pprint import pprint
 import hashlib
 import sys
-import random
 import time
 
 import msgpack
-import copy
 
 import gzip
 import secrets
@@ -50,7 +52,10 @@ except ImportError:
 else:
     faulthandler.enable()
 
-CHUNKSIZE = 2187
+# For RAW:
+#CHUNKSIZE = 2187
+# For AES:
+CHUNKSIZE = 2176
 SYNCWRITES = True
 
 def log(txt):
@@ -257,6 +262,7 @@ class TangleBlob():
         if bundles:
             sendEmOff(bundles, self.iotaApi)
 
+
 class TangleFileTreeElement(TangleBlob):
     def __init__(self, name: str, lastMilestoneIndex: int, parent, iotaApi: Iota) -> None:
         if isinstance(parent, bytes):
@@ -444,6 +450,8 @@ class TangleFile():
             self.hash = hashlib.sha256(newData).digest()
             self.writeKey = hashlib.sha3_384(b'f' + self.parent.writeKey + self.hash).digest()
             self.readKey = hashlib.sha3_384(b'f' + self.parent.readKey + self.hash).digest()
+            # Maybe this way the gc will remove it quicker?
+            del self.blob
             self.blob = TangleBlob(self.writeKey, self.readKey, self.iotaApi)
             self.blob.append(newData)
             self.size = self.blob.getSize()