diff --git a/bdk/storage/sd.c b/bdk/storage/sd.c
new file mode 100644
index 0000000..9f45fe9
--- /dev/null
+++ b/bdk/storage/sd.c
@@ -0,0 +1,250 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ * Copyright (c) 2018-2022 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <storage/sd.h>
+#include <storage/sdmmc.h>
+#include <storage/sdmmc_driver.h>
+#include <gfx_utils.h>
+#include <libs/fatfs/ff.h>
+#include <mem/heap.h>
+
+static bool sd_mounted = false;
+static bool sd_init_done = false;
+static u16  sd_errors[3] = { 0 }; // Init and Read/Write errors.
+static u32  sd_mode = SD_UHS_SDR104;
+
+sdmmc_t sd_sdmmc;
+sdmmc_storage_t sd_storage;
+FATFS sd_fs;
+
+void sd_error_count_increment(u8 type)
+{
+	switch (type)
+	{
+	case SD_ERROR_INIT_FAIL:
+		sd_errors[0]++;
+		break;
+	case SD_ERROR_RW_FAIL:
+		sd_errors[1]++;
+		break;
+	case SD_ERROR_RW_RETRY:
+		sd_errors[2]++;
+		break;
+	}
+}
+
+u16 *sd_get_error_count()
+{
+	return sd_errors;
+}
+
+bool sd_get_card_removed()
+{
+	if (sd_init_done && !sdmmc_get_sd_inserted())
+		return true;
+
+	return false;
+}
+
+bool sd_get_card_initialized()
+{
+	return sd_init_done;
+}
+
+bool sd_get_card_mounted()
+{
+	return sd_mounted;
+}
+
+u32 sd_get_mode()
+{
+	return sd_mode;
+}
+
+int sd_init_retry(bool power_cycle)
+{
+	u32 bus_width = SDMMC_BUS_WIDTH_4;
+	u32 type = SDHCI_TIMING_UHS_SDR104;
+
+	// Power cycle SD card.
+	if (power_cycle)
+	{
+		sd_mode--;
+		sdmmc_storage_end(&sd_storage);
+	}
+
+	// Get init parameters.
+	switch (sd_mode)
+	{
+	case SD_INIT_FAIL: // Reset to max.
+		return 0;
+	case SD_1BIT_HS25:
+		bus_width = SDMMC_BUS_WIDTH_1;
+		type = SDHCI_TIMING_SD_HS25;
+		break;
+	case SD_4BIT_HS25:
+		type = SDHCI_TIMING_SD_HS25;
+		break;
+	case SD_UHS_SDR82:
+		type = SDHCI_TIMING_UHS_SDR82;
+		break;
+	case SD_UHS_SDR104:
+		type = SDHCI_TIMING_UHS_SDR104;
+		break;
+	default:
+		sd_mode = SD_UHS_SDR104;
+	}
+
+	return sdmmc_storage_init_sd(&sd_storage, &sd_sdmmc, bus_width, type);
+}
+
+bool sd_initialize(bool power_cycle)
+{
+	if (power_cycle)
+		sdmmc_storage_end(&sd_storage);
+
+	int res = !sd_init_retry(false);
+
+	while (true)
+	{
+		if (!res)
+			return true;
+		else if (!sdmmc_get_sd_inserted()) // SD Card is not inserted.
+		{
+			sd_mode = SD_UHS_SDR104;
+			break;
+		}
+		else
+		{
+			sd_errors[SD_ERROR_INIT_FAIL]++;
+
+			if (sd_mode == SD_INIT_FAIL)
+				break;
+			else
+				res = !sd_init_retry(true);
+		}
+	}
+
+	sdmmc_storage_end(&sd_storage);
+
+	return false;
+}
+
+bool sd_mount()
+{
+	if (sd_mounted)
+		return true;
+
+	int res = 0;
+
+	if (!sd_init_done)
+		res = !sd_initialize(false);
+
+	if (res)
+	{
+		gfx_con.mute = false;
+		EPRINTF("Failed to init SD card.");
+		if (!sdmmc_get_sd_inserted())
+			EPRINTF("Make sure that it is inserted.");
+		else
+			EPRINTF("SD Card Reader is not properly seated!");
+	}
+	else
+	{
+		sd_init_done = true;
+		res = f_mount(&sd_fs, "0:", 1); // Volume 0 is SD.
+		if (res == FR_OK)
+		{
+			sd_mounted = true;
+			return true;
+		}
+		else
+		{
+			gfx_con.mute = false;
+			EPRINTFARGS("Failed to mount SD card (FatFS Error %d).\nMake sure that a FAT partition exists..", res);
+		}
+	}
+
+	return false;
+}
+
+static void _sd_deinit(bool deinit)
+{
+	if (deinit && sd_mode == SD_INIT_FAIL)
+		sd_mode = SD_UHS_SDR104;
+
+	if (sd_init_done && sd_mounted)
+	{
+		f_mount(NULL, "0:", 1); // Volume 0 is SD.
+		sd_mounted = false;
+	}
+	if (sd_init_done && deinit)
+	{
+		sdmmc_storage_end(&sd_storage);
+		sd_init_done = false;
+	}
+}
+
+void sd_unmount() { _sd_deinit(false); }
+void sd_end()     { _sd_deinit(true); }
+
+bool sd_is_gpt()
+{
+	return sd_fs.part_type;
+}
+
+void *sd_file_read(const char *path, u32 *fsize)
+{
+	FIL fp;
+	if (f_open(&fp, path, FA_READ) != FR_OK)
+		return NULL;
+
+	u32 size = f_size(&fp);
+	if (fsize)
+		*fsize = size;
+
+	void *buf = malloc(size);
+
+	if (f_read(&fp, buf, size, NULL) != FR_OK)
+	{
+		free(buf);
+		f_close(&fp);
+
+		return NULL;
+	}
+
+	f_close(&fp);
+
+	return buf;
+}
+
+int sd_save_to_file(void *buf, u32 size, const char *filename)
+{
+	FIL fp;
+	u32 res = 0;
+	res = f_open(&fp, filename, FA_CREATE_ALWAYS | FA_WRITE);
+	if (res)
+	{
+		EPRINTFARGS("Error (%d) creating file\n%s.\n", res, filename);
+		return res;
+	}
+
+	f_write(&fp, buf, size, NULL);
+	f_close(&fp);
+
+	return 0;
+}