diff --git a/src/SD.cpp b/src/SD.cpp
index 4322a19..d22ddec 100644
--- a/src/SD.cpp
+++ b/src/SD.cpp
@@ -138,7 +138,7 @@ File SDClass::open(const char *filepath, uint8_t mode /* = FA_READ */)
     Error_Handler();
   }
 
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
   file._fil->obj.fs = 0;
   file._dir.obj.fs = 0;
 #else
@@ -209,7 +209,7 @@ void File::ls(uint8_t flags, uint8_t indent)
   char *fn;
 
 #if _USE_LFN
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
   /* altname */
 #else
   static char lfn[_MAX_LFN];
@@ -226,7 +226,7 @@ void File::ls(uint8_t flags, uint8_t indent)
     if (fno.fname[0] == '.') {
       continue;
     }
-#if _USE_LFN && _FATFS != 68300
+#if _USE_LFN && (_FATFS != 68300 && _FATFS != 80286)
     fn = *fno.lfname ? fno.lfname : fno.fname;
 #else
     fn = fno.fname;
@@ -360,7 +360,7 @@ int File::read(void *buf, size_t len)
 void File::close()
 {
   if (_name) {
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
     if (_fil) {
       if (_fil->obj.fs != 0) {
 #else
@@ -377,7 +377,7 @@ void File::close()
       _fil = NULL;
     }
 
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
     if (_dir.obj.fs != 0) {
 #else
     if (_dir.fs != 0) {
@@ -459,7 +459,7 @@ uint32_t File::size()
 
 File::operator bool()
 {
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
   return !((_name == NULL) || ((_fil == NULL) && (_dir.obj.fs == 0)) || ((_fil != NULL) && (_fil->obj.fs == 0) && (_dir.obj.fs == 0)));
 #else
   return !((_name == NULL) || ((_fil == NULL) && (_dir.fs == 0)) || ((_fil != NULL) && (_fil->fs == 0) && (_dir.fs == 0)));
@@ -523,13 +523,13 @@ bool File::isDirectory()
   if (_name == NULL) {
     Error_Handler();
   }
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
   if (_dir.obj.fs != 0)
 #else
   if (_dir.fs != 0)
 #endif
     return true;
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
   else if (_fil->obj.fs != 0)
 #else
   else if (_fil->fs != 0)
@@ -550,7 +550,7 @@ File File::openNextFile(uint8_t mode)
   FRESULT res = FR_OK;
   FILINFO fno;
   char *fn;
-#if _USE_LFN && _FATFS != 68300
+#if _USE_LFN && (_FATFS != 68300 && _FATFS != 80286)
   static char lfn[_MAX_LFN];
   fno.lfname = lfn;
   fno.lfsize = sizeof(lfn);
@@ -563,7 +563,7 @@ File File::openNextFile(uint8_t mode)
     if (fno.fname[0] == '.') {
       continue;
     }
-#if _USE_LFN && _FATFS != 68300
+#if _USE_LFN && (_FATFS != 68300 && _FATFS != 80286)
     fn = *fno.lfname ? fno.lfname : fno.fname;
 #else
     fn = fno.fname;
@@ -589,7 +589,7 @@ File File::openNextFile(uint8_t mode)
 void File::rewindDirectory(void)
 {
   if (isDirectory()) {
-#if _FATFS == 68300
+#if (_FATFS == 68300) || (_FATFS == 80286)
     if (_dir.obj.fs != 0) {
 #else
     if (_dir.fs != 0) {
diff --git a/src/ffconf.h b/src/ffconf.h
index 3120ca0..f73d58c 100644
--- a/src/ffconf.h
+++ b/src/ffconf.h
@@ -12,7 +12,17 @@
 #if __has_include("ffconf_custom.h")
   #include "ffconf_custom.h"
 #else
-  #if _FATFS == 68300
+  #if defined(FF_DEFINED) && !defined(_FATFS)
+    #define _FATFS FF_DEFINED
+  #endif
+
+  #if _FATFS == 80286
+    /* Ensure backward compatibility with release prior to FatFs 0.14 */
+    /* Those flags are */
+    #define _USE_WRITE 1
+    #define _USE_IOCTL 1
+    #include "ffconf_default_80286.h"
+  #elif _FATFS == 68300
     #include "ffconf_default_68300.h"
   #else
     #include "ffconf_default_32020.h"
diff --git a/src/ffconf_default_80286.h b/src/ffconf_default_80286.h
new file mode 100644
index 0000000..1c54994
--- /dev/null
+++ b/src/ffconf_default_80286.h
@@ -0,0 +1,296 @@
+/*---------------------------------------------------------------------------/
+/  Configurations of FatFs Module
+/---------------------------------------------------------------------------*/
+
+#define FFCONF_DEF  80286 /* Revision ID */
+
+/*---------------------------------------------------------------------------/
+/ Function Configurations
+/---------------------------------------------------------------------------*/
+
+#define FF_FS_READONLY  0
+/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)
+/  Read-only configuration removes writing API functions, f_write(), f_sync(),
+/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()
+/  and optional writing functions as well. */
+
+
+#define FF_FS_MINIMIZE  0
+/* This option defines minimization level to remove some basic API functions.
+/
+/   0: Basic functions are fully enabled.
+/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()
+/      are removed.
+/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.
+/   3: f_lseek() function is removed in addition to 2. */
+
+
+#define FF_USE_FIND   0
+/* This option switches filtered directory read functions, f_findfirst() and
+/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */
+
+
+#define FF_USE_MKFS   0
+/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
+
+
+#define FF_USE_FASTSEEK 0
+/* This option switches fast seek function. (0:Disable or 1:Enable) */
+
+
+#define FF_USE_EXPAND 0
+/* This option switches f_expand function. (0:Disable or 1:Enable) */
+
+
+#define FF_USE_CHMOD  0
+/* This option switches attribute manipulation functions, f_chmod() and f_utime().
+/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
+
+
+#define FF_USE_LABEL  0
+/* This option switches volume label functions, f_getlabel() and f_setlabel().
+/  (0:Disable or 1:Enable) */
+
+
+#define FF_USE_FORWARD  0
+/* This option switches f_forward() function. (0:Disable or 1:Enable) */
+
+
+#define FF_USE_STRFUNC  0
+#define FF_PRINT_LLI  1
+#define FF_PRINT_FLOAT  1
+#define FF_STRF_ENCODE  3
+/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
+/  f_printf().
+/
+/   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
+/   1: Enable without LF-CRLF conversion.
+/   2: Enable with LF-CRLF conversion.
+/
+/  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
+/  makes f_printf() support floating point argument. These features want C99 or later.
+/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
+/  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
+/  to be read/written via those functions.
+/
+/   0: ANSI/OEM in current CP
+/   1: Unicode in UTF-16LE
+/   2: Unicode in UTF-16BE
+/   3: Unicode in UTF-8
+*/
+
+
+/*---------------------------------------------------------------------------/
+/ Locale and Namespace Configurations
+/---------------------------------------------------------------------------*/
+
+#define FF_CODE_PAGE  850
+/* This option specifies the OEM code page to be used on the target system.
+/  Incorrect code page setting can cause a file open failure.
+/
+/   437 - U.S.
+/   720 - Arabic
+/   737 - Greek
+/   771 - KBL
+/   775 - Baltic
+/   850 - Latin 1
+/   852 - Latin 2
+/   855 - Cyrillic
+/   857 - Turkish
+/   860 - Portuguese
+/   861 - Icelandic
+/   862 - Hebrew
+/   863 - Canadian French
+/   864 - Arabic
+/   865 - Nordic
+/   866 - Russian
+/   869 - Greek 2
+/   932 - Japanese (DBCS)
+/   936 - Simplified Chinese (DBCS)
+/   949 - Korean (DBCS)
+/   950 - Traditional Chinese (DBCS)
+/     0 - Include all code pages above and configured by f_setcp()
+*/
+
+
+#define FF_USE_LFN    3
+#define FF_MAX_LFN    255
+/* The FF_USE_LFN switches the support for LFN (long file name).
+/
+/   0: Disable LFN. FF_MAX_LFN has no effect.
+/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.
+/   2: Enable LFN with dynamic working buffer on the STACK.
+/   3: Enable LFN with dynamic working buffer on the HEAP.
+/
+/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
+/  requires certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
+/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
+/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
+/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
+/  specification.
+/  When use stack for the working buffer, take care on stack overflow. When use heap
+/  memory for the working buffer, memory management functions, ff_memalloc() and
+/  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */
+
+
+#define FF_LFN_UNICODE  0
+/* This option switches the character encoding on the API when LFN is enabled.
+/
+/   0: ANSI/OEM in current CP (TCHAR = char)
+/   1: Unicode in UTF-16 (TCHAR = WCHAR)
+/   2: Unicode in UTF-8 (TCHAR = char)
+/   3: Unicode in UTF-32 (TCHAR = DWORD)
+/
+/  Also behavior of string I/O functions will be affected by this option.
+/  When LFN is not enabled, this option has no effect. */
+
+
+#define FF_LFN_BUF    255
+#define FF_SFN_BUF    12
+/* This set of options defines size of file name members in the FILINFO structure
+/  which is used to read out directory items. These values should be sufficient for
+/  the file names to read. The maximum possible length of the read file name depends
+/  on character encoding. When LFN is not enabled, these options have no effect. */
+
+
+#define FF_FS_RPATH   0
+/* This option configures support for relative path.
+/
+/   0: Disable relative path and remove related functions.
+/   1: Enable relative path. f_chdir() and f_chdrive() are available.
+/   2: f_getcwd() function is available in addition to 1.
+*/
+
+
+/*---------------------------------------------------------------------------/
+/ Drive/Volume Configurations
+/---------------------------------------------------------------------------*/
+
+#define FF_VOLUMES    1
+/* Number of volumes (logical drives) to be used. (1-10) */
+
+
+#define FF_STR_VOLUME_ID  0
+#define FF_VOLUME_STRS    "RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
+/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
+/  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
+/  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
+/  logical drives. Number of items must not be less than FF_VOLUMES. Valid
+/  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
+/  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
+/  not defined, a user defined volume string table is needed as:
+/
+/  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
+*/
+
+
+#define FF_MULTI_PARTITION  0
+/* This option switches support for multiple volumes on the physical drive.
+/  By default (0), each logical drive number is bound to the same physical drive
+/  number and only an FAT volume found on the physical drive will be mounted.
+/  When this function is enabled (1), each logical drive number can be bound to
+/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
+/  function will be available. */
+
+
+#define FF_MIN_SS   512
+#define FF_MAX_SS   512
+/* This set of options configures the range of sector size to be supported. (512,
+/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
+/  harddisk, but a larger value may be required for on-board flash memory and some
+/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
+/  for variable sector size mode and disk_ioctl() function needs to implement
+/  GET_SECTOR_SIZE command. */
+
+
+#define FF_LBA64    0
+/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)
+/  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */
+
+
+#define FF_MIN_GPT    0x10000000
+/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
+/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */
+
+
+#define FF_USE_TRIM   0
+/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
+/  To enable Trim function, also CTRL_TRIM command should be implemented to the
+/  disk_ioctl() function. */
+
+
+
+/*---------------------------------------------------------------------------/
+/ System Configurations
+/---------------------------------------------------------------------------*/
+
+#define FF_FS_TINY    0
+/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
+/  At the tiny configuration, size of file object (FIL) is shrinking FF_MAX_SS bytes.
+/  Instead of private sector buffer eliminated from the file object, common sector
+/  buffer in the filesystem object (FATFS) is used for the file data transfer. */
+
+
+#define FF_FS_EXFAT   0
+/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
+/  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)
+/  Note that enabling exFAT discards ANSI C (C89) compatibility. */
+
+
+#define FF_FS_NORTC   0
+#define FF_NORTC_MON  1
+#define FF_NORTC_MDAY 1
+#define FF_NORTC_YEAR 2022
+/* The option FF_FS_NORTC switches timestamp feature. If the system does not have
+/  an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the
+/  timestamp feature. Every object modified by FatFs will have a fixed timestamp
+/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
+/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
+/  added to the project to read current time form real-time clock. FF_NORTC_MON,
+/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
+/  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */
+
+
+#define FF_FS_NOFSINFO  0
+/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
+/  option, and f_getfree() function at the first time after volume mount will force
+/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
+/
+/  bit0=0: Use free cluster count in the FSINFO if available.
+/  bit0=1: Do not trust free cluster count in the FSINFO.
+/  bit1=0: Use last allocated cluster number in the FSINFO if available.
+/  bit1=1: Do not trust last allocated cluster number in the FSINFO.
+*/
+
+
+#define FF_FS_LOCK    0
+/* The option FF_FS_LOCK switches file lock function to control duplicated file open
+/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY
+/  is 1.
+/
+/  0:  Disable file lock function. To avoid volume corruption, application program
+/      should avoid illegal open, remove and rename to the open objects.
+/  >0: Enable file lock function. The value defines how many files/sub-directories
+/      can be opened simultaneously under file lock control. Note that the file
+/      lock control is independent of re-entrancy. */
+
+
+#define FF_FS_REENTRANT 0
+#define FF_FS_TIMEOUT 1000
+/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
+/  module itself. Note that regardless of this option, file access to different
+/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
+/  and f_fdisk() function, are always not re-entrant. Only file/directory access
+/  to the same volume is under control of this feature.
+/
+/   0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.
+/   1: Enable re-entrancy. Also user provided synchronization handlers,
+/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give()
+/      function, must be added to the project. Samples are available in ffsystem.c.
+/
+/  The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.
+*/
+
+
+
+/*--- End of configuration options ---*/