diff --git a/boards/gearup/airbrainh743/init/rc.board_defaults b/boards/gearup/airbrainh743/init/rc.board_defaults
index 4ef2ce41ee..6a67bd3226 100644
--- a/boards/gearup/airbrainh743/init/rc.board_defaults
+++ b/boards/gearup/airbrainh743/init/rc.board_defaults
@@ -12,6 +12,13 @@ param set-default CBRK_SUPPLY_CHK 894281
 
 param set-default IMU_GYRO_RATEMAX 2000
 
-# W25N NAND flash with littlefs (128 MB): larger buffer, auto-rotate
-set LOGGER_BUF 32
-param set-default SDLOG_DIRS_MAX 3
+# W25N NAND flash with littlefs (128 MB): small log file size so we can keep
+# a few recent logs, and fill up to 95%.
+param set-default SDLOG_ROTATE 95
+param set-default SDLOG_MAX_SIZE 40
+
+# Store missions in RAM
+param set-default SYS_DM_BACKEND 1
+
+# Ignore that there is no SD card
+param set-default COM_ARM_SDCARD 0