diff --git a/components/fatfs/fatfs_utils/fs_object.py b/components/fatfs/fatfs_utils/fs_object.py
index 61a0f3a57f..00de17676c 100644
--- a/components/fatfs/fatfs_utils/fs_object.py
+++ b/components/fatfs/fatfs_utils/fs_object.py
@@ -12,8 +12,8 @@ from .fatfs_state import FATFSState
 from .long_filename_utils import (build_lfn_full_name, build_lfn_unique_entry_name_order,
                                   get_required_lfn_entries_count, split_name_to_lfn_entries,
                                   split_name_to_lfn_entry_blocks)
-from .utils import (DATETIME, MAX_EXT_SIZE, MAX_NAME_SIZE, FATDefaults, build_lfn_short_entry_name, lfn_checksum,
-                    required_clusters_count, split_content_into_sectors, split_to_name_and_extension)
+from .utils import (DATETIME, MAX_EXT_SIZE, MAX_NAME_SIZE, FATDefaults, build_lfn_short_entry_name, build_name,
+                    lfn_checksum, required_clusters_count, split_content_into_sectors, split_to_name_and_extension)
 
 
 class File:
@@ -45,7 +45,8 @@ class File:
         self._first_cluster = value
 
     def name_equals(self, name: str, extension: str) -> bool:
-        return self.name == name and self.extension == extension
+        equals_: bool = build_name(name, extension) == build_name(self.name, self.extension)
+        return equals_
 
     def write(self, content: bytes) -> None:
         self.entry.update_content_size(len(content))
@@ -112,7 +113,8 @@ class Directory:
         self._first_cluster = value
 
     def name_equals(self, name: str, extension: str) -> bool:
-        return self.name == name and self.extension == extension
+        equals_: bool = build_name(name, extension) == build_name(self.name, self.extension)
+        return equals_
 
     @property
     def entries_count(self) -> int:
@@ -141,7 +143,7 @@ class Directory:
 
     def lookup_entity(self, object_name: str, extension: str):  # type: ignore
         for entity in self.entities:
-            if entity.name == object_name and entity.extension == extension:
+            if build_name(entity.name, entity.extension) == build_name(object_name, extension):
                 return entity
         return None
 
diff --git a/components/fatfs/fatfs_utils/long_filename_utils.py b/components/fatfs/fatfs_utils/long_filename_utils.py
index f28816d74c..0e1521c612 100644
--- a/components/fatfs/fatfs_utils/long_filename_utils.py
+++ b/components/fatfs/fatfs_utils/long_filename_utils.py
@@ -3,7 +3,7 @@
 from typing import List
 
 from .entry import Entry
-from .utils import convert_to_utf16_and_pad
+from .utils import build_name, convert_to_utf16_and_pad
 
 #  File name with long filenames support can be as long as memory allows. It is split into entries
 #  holding 13 characters of the filename, thus the number of required entries is ceil(len(long_name) / 13).
@@ -85,7 +85,7 @@ def build_lfn_full_name(name: str, extension: str) -> str:
     The extension is optional, and the long filename entry explicitly specifies it,
     on the opposite as for short file names.
     """
-    lfn_record: str = f'{name}.{extension}' if len(extension) > 0 else name
+    lfn_record: str = build_name(name, extension)
     # the name must be terminated with NULL terminator
     # if it doesn't fit into the set of long name directory entries
     if len(lfn_record) % Entry.CHARS_PER_ENTRY != 0:
diff --git a/components/fatfs/fatfs_utils/utils.py b/components/fatfs/fatfs_utils/utils.py
index 72e3e0dee5..06beb6c752 100644
--- a/components/fatfs/fatfs_utils/utils.py
+++ b/components/fatfs/fatfs_utils/utils.py
@@ -222,6 +222,10 @@ TIME_ENTRY = BitStruct(
 )
 
 
+def build_name(name: str, extension: str) -> str:
+    return f'{name}.{extension}' if len(extension) > 0 else name
+
+
 def build_date_entry(year: int, mon: int, mday: int) -> int:
     """
     :param year: denotes year starting from 1980 (0 ~ 1980, 1 ~ 1981, etc), valid values are 1980 + 0..127 inclusive