diff --git a/updater/utils.py b/updater/utils.py
new file mode 100644
index 0000000..0b9f7b9
--- /dev/null
+++ b/updater/utils.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+
+def convert_bytes(n: float) -> str:
+    """ Converts a value expressed in bytes to a human readable String.
+
+    :param n: Size in bytes.
+    :returns: A string formatted in human readable format.
+    :rtype: str.
+    """
+    K, M, G, T, P = 1 << 10, 1 << 20, 1 << 30, 1 << 40, 1 << 50
+    if   n >= P:
+        return "%.2fPb" % (float(n) / T)
+    elif   n >= T:
+        return "%.2fTb" % (float(n) / T)
+    elif n >= G:
+        return "%.2fGb" % (float(n) / G)
+    elif n >= M:
+        return "%.2fMb" % (float(n) / M)
+    elif n >= K:
+        return "%.2fKb" % (float(n) / K)
+    else:
+        return "%d" % n