diff --git a/firmware/drivers/sdmmc_host.c b/firmware/drivers/sdmmc_host.c
index 8db8fcfc92..337de92561 100644
--- a/firmware/drivers/sdmmc_host.c
+++ b/firmware/drivers/sdmmc_host.c
@@ -21,6 +21,7 @@
 #include "system.h"
 #include "storage.h"
 #include "disk_cache.h"
+#include "led.h"
 #include "debug.h"
 #include "panic.h"
 #include "logf.h"
@@ -48,6 +49,29 @@ DECLARE_FIRST_DRIVE(int sdmmc_mmc_first_drive);
 static volatile long sdmmc_mmc_last_activity;
 #endif
 
+static bool sdmmc_host_any_active(void)
+{
+#if CONFIG_STORAGE & STORAGE_SD
+    for (size_t i = 0; i < ARRAYLEN(sdmmc_sd_hosts); ++i)
+        if (sdmmc_sd_hosts[i]->led_active)
+            return true;
+#endif
+
+#if CONFIG_STORAGE & STORAGE_MMC
+    for (size_t i = 0; i < ARRAYLEN(sdmmc_mmc_hosts); ++i)
+        if (sdmmc_mmc_hosts[i]->led_active)
+            return true;
+#endif
+
+    return false;
+}
+
+static void sdmmc_host_set_led(struct sdmmc_host *host, bool on)
+{
+    host->led_active = on;
+    led(sdmmc_host_any_active());
+}
+
 static int sdmmc_host_get_logical_drive(struct sdmmc_host *host)
 {
     switch (host->config.type)
@@ -734,6 +758,7 @@ static int sdmmc_host_transfer(struct sdmmc_host *host,
     int rc = -1;
 
     mutex_lock(&host->lock);
+    sdmmc_host_set_led(host, true);
 
     if (!host->enabled)
         goto out;
@@ -843,6 +868,7 @@ static int sdmmc_host_transfer(struct sdmmc_host *host,
     }
 
 out:
+    sdmmc_host_set_led(host, false);
     mutex_unlock(&host->lock);
     return rc;
 }
diff --git a/firmware/export/sdmmc_host.h b/firmware/export/sdmmc_host.h
index 5258460196..d4a431bbdb 100644
--- a/firmware/export/sdmmc_host.h
+++ b/firmware/export/sdmmc_host.h
@@ -242,6 +242,7 @@ struct sdmmc_host
     bool initialized : 1;
     bool is_hcs_card : 1;
     bool use_cmd23   : 1;
+    bool led_active  : 1; /* LED active may be read without lock */
 
     /* Controller implemented by the target */
     const struct sdmmc_controller_ops *ops;