diff --git a/targets/f7/furi_hal/furi_hal_flash.c b/targets/f7/furi_hal/furi_hal_flash.c
index 138e07eab..63932ac61 100644
--- a/targets/f7/furi_hal/furi_hal_flash.c
+++ b/targets/f7/furi_hal/furi_hal_flash.c
@@ -41,7 +41,11 @@
   > If for any reason this test is never passed, this means there is a failure in the system and there is no other
   > way to recover than applying a device reset. 
  */
-#define FURI_HAL_FLASH_C2_LOCK_TIMEOUT_MS (3000U) /* 3 seconds */
+// Was previously 3000U, 3 seconds
+// Changing furi_assert() to furi_check() brought timeout crashes
+// Internal storage is very slow, and "big" files will often cause a "timeout" with 3 seconds
+// 10 seconds seems fine, the file operations complete successfully, albeit slowly
+#define FURI_HAL_FLASH_C2_LOCK_TIMEOUT_MS (10000U) /* 10 seconds */
 
 #define IS_ADDR_ALIGNED_64BITS(__VALUE__) (((__VALUE__) & 0x7U) == (0x00UL))
 #define IS_FLASH_PROGRAM_ADDRESS(__VALUE__)                                             \