XIAO store data in QSPI flash memory (Mbed)

Hello,
Can you use more than 64k of this RAM with this code?
From 128k, it seems that the function QSPI_WaitForReady(); freezes.

The last debug lines:

(QSPI_Erase) Erasing memory
(QSPI_Erase (Waiting Loop Breakout)) QSPI is busy/idle ... Result = 0
(QSPI_Erase (Waiting Loop Breakout)) QSPI Status flag = 0xA (from NRF_QSPI) or 0xA (from *QSPI_Status_Ptr)
(QSPI_Erase (Finished Waiting)) QSPI is busy/idle ... Result = 0
(QSPI_Erase (Finished Waiting)) QSPI Status flag = 0xA (from NRF_QSPI) or 0xA (from *QSPI_Status_Ptr)
(QSPI_Initialise_Page) QSPI took 0ms to erase a 64Kb page
(Setup) QSPI read after erase
(Setup) QSPI took 20ms to read 128Kb ... Read result = 0
Data : 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF