user48730: I'm looking for a way to store data on flash as on ESP8266 or ESP32 using FS.h,  LITTLEFS.h but it fails.
Is is possible on Nano IOT33 ?

user31105: It seems this library can be used:
https://github.com/cmaglie/FlashStorage
Library: FlashStorage library for Arduino
About info: A convenient way to store data into Flash memory on the ATSAMD21 and ATSAMD51 processor family
Mentioned in external related article (thanks to Juraj): https://forum.arduino.cc/t/persistent-storage-for-arduino-nano-33-iot-no-eeprom/623137
UPDATE
(See remark of Juraj below: this is NOT for a Nano IOT33)
See Library: https://github.com/khoih-prog/FS_Nano33BLE
About info: Wrapper of FS (LittleFS or not-advisable FATFS) for Arduino MBED nRF52840-based boards, such as Nano_33_BLE boards. This library facilitates your usage of FS (LittleFS or FATFS) for the onboard flash. FS supports power fail safety and high performance
Mentioned in:
https://forum.arduino.cc/t/fs-nano33ble-library-for-nano-33-ble-using-littlefs-fatfs/900463

48730: <p>I'm looking for a way to store data on flash as on ESP8266 or ESP32 using <code>FS.h</code>,  <code>LITTLEFS.h</code> but it fails.</p>
<p>Is is possible on Nano IOT33 ?</p>
 31105: <p>It seems this library can be used:</p>
<p><a href="https://github.com/cmaglie/FlashStorage" rel="nofollow noreferrer">https://github.com/cmaglie/FlashStorage</a></p>
<p>Library: FlashStorage library for Arduino</p>
<p>About info: A convenient way to store data into Flash memory on the ATSAMD21 and ATSAMD51 processor family</p>
<p>Mentioned in external related article (thanks to Juraj): <a href="https://forum.arduino.cc/t/persistent-storage-for-arduino-nano-33-iot-no-eeprom/623137" rel="nofollow noreferrer">https://forum.arduino.cc/t/persistent-storage-for-arduino-nano-33-iot-no-eeprom/623137</a></p>
<p><strong>UPDATE</strong></p>
<p>(See remark of Juraj below: this is NOT for a Nano IOT33)</p>
<p>See Library: <a href="https://github.com/khoih-prog/FS_Nano33BLE" rel="nofollow noreferrer">https://github.com/khoih-prog/FS_Nano33BLE</a></p>
<p>About info: Wrapper of FS (LittleFS or not-advisable FATFS) for Arduino MBED nRF52840-based boards, such as Nano_33_BLE boards. This library facilitates your usage of FS (LittleFS or FATFS) for the onboard flash. FS supports power fail safety and high performance</p>
<p>Mentioned in:
<a href="https://forum.arduino.cc/t/fs-nano33ble-library-for-nano-33-ble-using-littlefs-fatfs/900463" rel="nofollow noreferrer">https://forum.arduino.cc/t/fs-nano33ble-library-for-nano-33-ble-using-littlefs-fatfs/900463</a></p>
