diff --git a/src/storage.c b/src/storage.c
index 6d740b9..642241d 100644
--- a/src/storage.c
+++ b/src/storage.c
@@ -9,6 +9,20 @@
 #include "sequencenumber.h"
 #include "storage.h"
 
+
+// Get external flash device
+#if (CONFIG_SPI_NOR - 0) ||				\
+	DT_NODE_HAS_STATUS(DT_INST(0, jedec_spi_nor), okay)
+#define FLASH_DEVICE DT_LABEL(DT_INST(0, jedec_spi_nor))
+#define FLASH_NAME "JEDEC SPI-NOR"
+#elif (CONFIG_NORDIC_QSPI_NOR - 0) || \
+	DT_NODE_HAS_STATUS(DT_INST(0, nordic_qspi_nor), okay)
+#define FLASH_DEVICE DT_LABEL(DT_INST(0, nordic_qspi_nor))
+#define FLASH_NAME "JEDEC QSPI-NOR"
+#else
+#error Unsupported flash driver
+#endif
+
 // Maybe use this as param for init function
 #define SEC_COUNT 8U
 
@@ -67,7 +81,7 @@ int init_contact_storage(void) {
     struct flash_pages_info info;
     // define the nvs file system
     fs.offset = FLASH_AREA_OFFSET(storage);
-    rc = flash_get_page_info_by_offs(device_get_binding(DT_CHOSEN_ZEPHYR_FLASH_CONTROLLER_LABEL), fs.offset, &info);
+    rc = flash_get_page_info_by_offs(device_get_binding(FLASH_DEVICE), fs.offset, &info);
 
     if (rc) {
         // Error during retrieval of page information
@@ -76,7 +90,7 @@ int init_contact_storage(void) {
     fs.sector_size = info.size;
     fs.sector_count = SEC_COUNT;
 
-    rc = nvs_init(&fs, DT_CHOSEN_ZEPHYR_FLASH_CONTROLLER_LABEL);
+    rc = nvs_init(&fs, FLASH_DEVICE);
     if (rc) {
         // Error during nvs_init
         return rc;
@@ -86,6 +100,7 @@ int init_contact_storage(void) {
     rc = load_storage_information();
 
     printk("Currently %d contacts stored!\n", contact_information.count);
+    printk("Space available: %d\n", FLASH_AREA_SIZE(storage));
 
     return rc;
 }
@@ -112,12 +127,12 @@ int add_contact(contact_t* src) {
 }
 
 // TODO handle start and end
-// TODO lome: do we need this?
 int delete_contact(record_sequence_number_t sn) {
     storage_id_t id = convert_sn_to_storage_id(sn);
     int rc = nvs_delete(&fs, id);
     if (!rc) {
         // TODO lome: what happens, if contacts in the middle are deleted?
+        // Magic
         contact_information.count--;
         if (sn_equal(sn, get_oldest_sequence_number())) {
             contact_information.oldest_contact = sn_increment(contact_information.oldest_contact);
diff --git a/zephyr/nrf52840_mdk.overlay b/zephyr/nrf52840_mdk.overlay
index b9f3b97..fa80a1e 100644
--- a/zephyr/nrf52840_mdk.overlay
+++ b/zephyr/nrf52840_mdk.overlay
@@ -1,4 +1,6 @@
 
+/delete-node/ &storage_partition;
+
 / {
 	buttons {
 		compatible = "gpio-keys";
@@ -12,3 +14,16 @@
 	};
 
 };
+
+&mx25r64 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "storage";
+			reg = <0x0000000 0x00300000>;
+		};
+	};
+};
\ No newline at end of file
diff --git a/zephyr/nrf52840dk_nrf52840.overlay b/zephyr/nrf52840dk_nrf52840.overlay
new file mode 100644
index 0000000..b2acc58
--- /dev/null
+++ b/zephyr/nrf52840dk_nrf52840.overlay
@@ -0,0 +1,15 @@
+
+/delete-node/ &storage_partition;
+
+&mx25r64 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "storage";
+			reg = <0x0000000 0x00300000>;
+		};
+	};
+};
\ No newline at end of file
diff --git a/zephyr/prj.conf b/zephyr/prj.conf
index d2e571f..8be03c2 100644
--- a/zephyr/prj.conf
+++ b/zephyr/prj.conf
@@ -20,6 +20,21 @@ CONFIG_FLASH=y
 CONFIG_FLASH_PAGE_LAYOUT=y
 
 CONFIG_NVS=y
-CONFIG_LOG=y
 CONFIG_NVS_LOG_LEVEL_DBG=y
 CONFIG_MPU_ALLOW_FLASH_WRITE=y
+
+# CONFIG_DISK_ACCESS=y
+CONFIG_MAIN_STACK_SIZE=2048
+
+# Let __ASSERT do its job
+CONFIG_DEBUG=y
+
+CONFIG_LOG=y
+
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+
+# Need this when storage is on MX25R64
+CONFIG_NORDIC_QSPI_NOR=y
+CONFIG_NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096