diff --git a/tests/test_create_filenames.py b/tests/test_create_filenames.py
new file mode 100644
index 0000000..b0c1e85
--- /dev/null
+++ b/tests/test_create_filenames.py
@@ -0,0 +1,15 @@
+import pytest
+from tibi_hardlinks.filename_creation import create_backup_directory_name
+
+
+@pytest.mark.usefixtures("canned_data_output")
+@pytest.mark.parametrize("filename", ["example-old", "example-new"])
+def test_filename_good(filename, canned_data_output):
+    data = canned_data_output(filename)
+    filenames = {
+        "example-old": "XT1095/TA44909SO3/QPython3/1.0.3/2017-11-01_07-38-42",
+        "example-new": "OnePlus 7 Pro/7ea4c847/Luis.Babyphone/2.0.72/2020-10-30_09-12-41",
+    }
+
+    generated_filename = create_backup_directory_name(data)
+    assert filenames[filename] == generated_filename
diff --git a/tibi_hardlinks/filename_creation.py b/tibi_hardlinks/filename_creation.py
new file mode 100644
index 0000000..06b6476
--- /dev/null
+++ b/tibi_hardlinks/filename_creation.py
@@ -0,0 +1,24 @@
+import datetime
+import os
+
+HEIRACHY = (
+    "sys_ro.product.model",
+    "sys_ro.serialno",
+    "app_label",
+    "app_version_name",
+    "backup_time",
+)
+
+
+def create_backup_directory_name(backup_info, time_format="%Y-%m-%d_%H-%M-%S"):
+    utc_timestamp = backup_info["backup_time"]
+    backup_datetime = datetime.datetime.utcfromtimestamp(utc_timestamp)
+    backup_info["backup_time"] = backup_datetime.strftime(time_format)
+    ret_list = []
+    for part in HEIRACHY:
+        data = backup_info[part]
+        if len(data) == 0:
+            data = "DEFAULT"
+        ret_list.append(data)
+
+    return os.path.join("", *ret_list)