diff --git a/source/libublsettings.c b/source/libublsettings.c
index f7cf7cc..6289ad3 100644
--- a/source/libublsettings.c
+++ b/source/libublsettings.c
@@ -35,6 +35,14 @@ float yon_size_convert_automatic(int bytes, int *size){
     return byte_float;
 }
 
+long yon_size_to_bytes(long size, int size_mod){
+    long final = size;
+    for (int i=0;i<size_mod;i++){
+        final=final*1024;
+    }
+    return final;
+}
+
 int yon_get_size_get_from_letter(char size){
     switch (size){
         case 'K': return 0;
@@ -65,6 +73,38 @@ char *yon_size_get_mod(int size){
     return size_modifier;
 }
 
+double yon_size_long_convert_to_mod(double size, char mod){
+    int sizemod = yon_get_size_get_from_letter(mod);
+    double final_size = size;
+    for (int i=-1;i<sizemod;i++){
+        final_size/=1024;
+    }
+    return final_size;
+}
+
+double yon_size_long_convert_automatic(unsigned long bytes, char *size){
+    int repeats;
+    double byte_float=bytes;
+    for (repeats=-1;byte_float>1024;repeats++){
+        byte_float=byte_float/1024;
+    }
+    if (repeats==-1) {
+        repeats=0;
+        byte_float=byte_float/1024;
+    }
+    switch(repeats){
+        case 0: (*size)='K';
+        break;
+        case 1: (*size)='M';
+        break;
+        case 2: (*size)='G';
+        break;
+        case 3: (*size)='T';
+        break; 
+    }
+    return byte_float;
+}
+
 config_str yon_dir_get_contents(char *dir_path, int *size){
     config_str dir = NULL;
     *size=0;
diff --git a/source/libublsettings.h b/source/libublsettings.h
index 7e39499..543f44f 100644
--- a/source/libublsettings.h
+++ b/source/libublsettings.h
@@ -1054,15 +1054,18 @@ config_str yon_ubl_get_all_users(int *user_size);
 
 int yon_password_get_min_len();
 
-/** yon_size_convert_automatic(int bytes, int *size)
- * [EN]
- * 
- * [RU]
- * Делит число [bytes] на 1024 пока оно не станет меньше 1024.
- * Возвращает получившееся число и устанавливает [size] равным количеству делений. 
-*/
+/// @brief Converts bytes amount to kilobytes, megabytes gigabytes or terabytes (K, M, G, T)
+/// @param bytes bytes to convert
+/// @param size pointer for conversion iteration number. use it with yon_size_get_mod() to get text string of conversion
+/// @return converted to kilobytes, megabytes gigabytes or terabytes vaue
 float yon_size_convert_automatic(int bytes, int *size);
 
+/// @brief Convert size from kilobytes, megabytes gigabytes or terabytes (K, M, G, T) to bytes
+/// @param size initial size to convert
+/// @param size_mod size modifier. Use yon_get_size_get_from_letter() to get.
+/// @return converted to bytes value
+long yon_size_to_bytes(long size, int size_mod);
+
 /**yon_get_size_get_from_letter(char size)
  * [EN]
  * 
@@ -1081,6 +1084,10 @@ int yon_get_size_get_from_letter(char size);
  */
 char *yon_size_get_mod(int size);
 
+double yon_size_long_convert_to_mod(double size, char mod);
+
+double yon_size_long_convert_automatic(unsigned long bytes, char *size);
+
 /**yon_file_path_proceed_spaces(char *path)
  * [EN]
  *