diff --git a/config.h b/config.h
index 0e35272..6110ad6 100644
--- a/config.h
+++ b/config.h
@@ -1,10 +1,12 @@
+#define SETTINGS_LINE_NUMBERS 2 /* 0 is disabled, 1 is enabled, 2 is relative */
+
+/* {{{ */
 #ifndef CONFIG_GUARD
 #define CONFIG_GUARD
 #include "defines.h"
 #include "sorting.h"
 #include "interactions.h"
-
-#define SETTINGS_LINE_NUMBERS 2 /* 0 is disabled, 1 is enabled, 2 is relative */
+/* }}} */
 
 static const mimetype mimetype_default_cmd[] = {
 	/* mimetype	shell command
@@ -93,9 +95,17 @@ static const binding key_binding[] = {
 	{ "a",		toggle_hidden_files,	NULL,			"toggle hidden files"		},
 	{ "\x7F",	toggle_hidden_files,	NULL,			"toggle hidden files"		}, /* backspace key */
 };
+
+static const char size_unit[] = { 'B', 'K', 'M', 'G', 'T', 'P' }; /* this defines the maximum size unit, deleting everything except B results in all sizes being displayed in byte */
+
+static const char ui_btm_text_storage_left[] = "total free";
+static const char ui_btm_current_dir_size[] = "sum of dir";
+
+/* {{{ */
 static const unsigned long binding_count = sizeof(key_binding) / sizeof(binding);
 static const unsigned long mimetype_default_count = sizeof(mimetype_default_cmd) / sizeof(mimetype);
 static const unsigned long file_extension_default_count = sizeof(file_extension_default_cmd) / sizeof(extension);
+static const char size_unit_count = (sizeof(size_unit) / sizeof(size_unit[0])) - 1;
 #else
 static const mimetype mimetype_default_cmd[];
 static const extension file_extension_default_cmd[];
@@ -103,5 +113,7 @@ static const binding key_binding[];
 static const unsigned long binding_count;
 static const unsigned long mimetype_default_count;
 static const unsigned long file_extension_default_count;
+static const char size_unit[];
+static const char size_unit_count;
 #endif
-
+/* }}} */
diff --git a/dir.c b/dir.c
index 2342e24..757f859 100644
--- a/dir.c
+++ b/dir.c
@@ -12,6 +12,8 @@
 #include "config.h"
 
 
+extern file *mid_content;
+extern unsigned long mid_file_count;
 extern unsigned int settings;
 extern unsigned int file_modifiers;
 extern unsigned int color_count;
@@ -160,7 +162,6 @@ void print_dir(WINDOW *win, char print_info, unsigned long *dir_file_count, file
 	float printed_size = 0;
 	char size_char = ' ';
 	char is_selected = 0;
-	static const char sizes[6] = { 'B', 'K', 'M', 'G', 'T', 'P' };
 
 	unsigned long offset_vertical = 0;
 	unsigned long offset_back = 0;
@@ -229,16 +230,15 @@ void print_dir(WINDOW *win, char print_info, unsigned long *dir_file_count, file
 
 		if (print_info) {
 			file_size = dir_content[i].file_size;
-			char size_index = 0;
-			while (file_size > 1) {
+			char size_index = -1;
+
+			do {
 				printed_size=file_size;
 				file_size /= 1024;
 				size_index++;
-				if (size_index >= 6) {
-					break;
-				}
-			}
-			size_char = sizes[size_index-1];
+			} while (file_size > 1 && size_index < size_unit_count);
+			size_char = size_unit[(unsigned)size_index];
+
 			if (dir_content[i].file_type == FILE_TYPE_DIR || dir_content[i].file_type == FILE_TYPE_SYMLINK) {
 				offset_back = line_width - (snprintf(NULL,0,"%ld", dir_content[i].file_size) + 1);
 			} else if (size_char =='B') {
diff --git a/threading.c b/threading.c
index bc57770..f295186 100644
--- a/threading.c
+++ b/threading.c
@@ -6,7 +6,9 @@
 #include <unistd.h>
 #include <time.h>
 #include <sys/stat.h>
+#include <sys/statvfs.h>
 
+#include "config.h"
 #include "dir.h"
 #include "file_previews.h"
 
@@ -246,7 +248,8 @@ void *thread_btm(){
 		free(btm_buffer);
 		int buffer_width = terminal_width;
 		btm_buffer = malloc(buffer_width);
-		memset(btm_buffer, 0, buffer_width);
+		memset(btm_buffer, ' ', buffer_width);
+		btm_buffer[buffer_width] = '\0';
 		btm_buffer[0] = (S_ISDIR(mid_content[selected_file_current].permissions))  ? 'd' : '-';
 		btm_buffer[1] = (mid_content[selected_file_current].permissions & S_IRUSR) ? 'r' : '-';
 		btm_buffer[2] = (mid_content[selected_file_current].permissions & S_IWUSR) ? 'w' : '-';
@@ -259,6 +262,32 @@ void *thread_btm(){
 		btm_buffer[9] = (mid_content[selected_file_current].permissions & S_IXOTH) ? 'x' : '-';
 
 
+		char *path;
+		path=getcwd(NULL, 0);
+		struct statvfs fs;
+		statvfs(path, &fs);
+
+		float disk_size_free =  fs.f_bsize * fs.f_bavail;
+		float parsed_number = 0;
+		int offset_back = buffer_width - strlen(ui_btm_text_storage_left);
+		strcpy(btm_buffer + offset_back, ui_btm_text_storage_left);
+		char *float_str = malloc(buffer_width / 4);
+
+		char size_index = -1;
+
+		do {
+			parsed_number=disk_size_free;
+			disk_size_free /= 1024;
+			size_index++;
+		} while (disk_size_free > 1 && size_index < size_unit_count);
+
+
+		snprintf(float_str, 10, "%0.2lf", parsed_number);
+
+		memcpy(btm_buffer + (offset_back - strlen(float_str) - 1), float_str, strlen(float_str));
+		btm_buffer[offset_back - 2] = size_unit[(unsigned)size_index];
+
+
 		pthread_mutex_unlock(&mutex_btm);
 	}
 	pthread_exit(0);