docs: Describe the approach of fatfsgen.py and fatfsparse.py

components/fatfs/fatfs_utils/entry.py

@@ -50,7 +50,7 @@ class Entry:
         'DIR_Name' / PaddedString(MAX_NAME_SIZE, SHORT_NAMES_ENCODING),
         'DIR_Name_ext' / PaddedString(MAX_EXT_SIZE, SHORT_NAMES_ENCODING),
         'DIR_Attr' / Int8ul,
-        'DIR_NTRes' / Int8ul,  # this tagged for lfn (0x00 for lfn prefix, 0x18 for short name in lfn)
+        'DIR_NTRes' / Int8ul,  # this tagged for lfn (0x00 for short entry in lfn, 0x18 for short name)
         'DIR_CrtTimeTenth' / Const(EMPTY_BYTE),  # ignored by esp-idf fatfs library
         'DIR_CrtTime' / Int16ul,  # ignored by esp-idf fatfs library
         'DIR_CrtDate' / Int16ul,  # ignored by esp-idf fatfs library

components/fatfs/fatfsgen.py

@@ -85,8 +85,8 @@ class FATFS:
                     object_timestamp_: datetime = FATFS_INCEPTION,
                     is_empty: bool = False) -> None:
         """
-        Root directory recursively finds the parent directory of the new file, allocates cluster,
-        entry and appends a new file into the parent directory.
+        This method allocates necessary clusters and creates a new file record in the directory required.
+        The directory must exists.
 
         When path_from_root is None the dir is root.