diff --git a/defines.hpp b/defines.hpp
index eeb441747a..3a6299f01c 100644
--- a/defines.hpp
+++ b/defines.hpp
@@ -50,16 +50,19 @@
 #define CELL2FEATURE_TMP_EXT ".c2f.tmp"
 
 #define COUNTRIES_FILE  "countries.txt"
+#define COUNTRIES_MIGRATE_FILE  "countries_mig.txt"
 
 #define WORLD_FILE_NAME "World"
 #define WORLD_COASTS_FILE_NAME "WorldCoasts"
+#define WORLD_COASTS_MIGRATE_FILE_NAME "WorldCoasts_mig"
 
 #define SETTINGS_FILE_NAME "settings.ini"
 
 #define SEARCH_CATEGORIES_FILE_NAME "categories.txt"
 
-#define PACKED_POLYGONS_FILE "packed_polygons.bin"
 #define PACKED_POLYGONS_INFO_TAG "info"
+#define PACKED_POLYGONS_FILE "packed_polygons.bin"
+#define PACKED_POLYGONS_MIGRATE_FILE "packed_polygons_mig.bin"
 
 #define EXTERNAL_RESOURCES_FILE "external_resources.txt"
 
diff --git a/map/framework.cpp b/map/framework.cpp
index 2bcb576d2c..ba2910eed2 100644
--- a/map/framework.cpp
+++ b/map/framework.cpp
@@ -1048,8 +1048,16 @@ void Framework::InitCountryInfoGetter()
   Platform const & platform = GetPlatform();
   try
   {
-    m_infoGetter.reset(new storage::CountryInfoReader(platform.GetReader(PACKED_POLYGONS_FILE),
-                                                      platform.GetReader(COUNTRIES_FILE)));
+    if(platform::migrate::NeedMigrate())
+    {
+      m_infoGetter.reset(new storage::CountryInfoGetter(platform.GetReader(PACKED_POLYGONS_FILE),
+                                                        platform.GetReader(COUNTRIES_FILE)));
+    }
+    else
+    {
+      m_infoGetter.reset(new storage::CountryInfoGetter(platform.GetReader(PACKED_POLYGONS_MIGRATE_FILE),
+                                                        platform.GetReader(COUNTRIES_MIGRATE_FILE)));
+    }
   }
   catch (RootException const & e)
   {
diff --git a/platform/local_country_file_utils.cpp b/platform/local_country_file_utils.cpp
index 4d5f610686..4c7aedac99 100644
--- a/platform/local_country_file_utils.cpp
+++ b/platform/local_country_file_utils.cpp
@@ -3,6 +3,7 @@
 #include "platform/country_file.hpp"
 #include "platform/mwm_version.hpp"
 #include "platform/platform.hpp"
+#include "platform/settings.hpp"
 
 #include "coding/file_name_utils.hpp"
 #include "coding/internal/file_data.hpp"
@@ -23,6 +24,25 @@
 
 namespace platform
 {
+namespace migrate
+{
+  // Set of functions to support migration between different versions of MWM
+  // with totaly incompatible formats.
+  // 151218 - Migrate to small single file MWM
+  uint64_t constexpr kRequiredVersion = 151218;
+  bool NeedMigrate()
+  {
+    uint32_t version;
+    if (!Settings::Get("LastMigration", version))
+      return true;
+
+    if (version >= kRequiredVersion)
+      return false;
+
+    return true;
+  }
+}  // namespace migrate
+
 namespace
 {
 char const kBitsExt[] = ".bftsegbits";
@@ -210,7 +230,8 @@ void FindAllLocalMapsAndCleanup(int64_t latestVersion, vector<LocalCountryFile>
 
   // World and WorldCoasts can be stored in app bundle or in resources
   // directory, thus it's better to get them via Platform.
-  for (string const & file : { WORLD_FILE_NAME, WORLD_COASTS_FILE_NAME })
+  for (string const & file : { WORLD_FILE_NAME,
+        (migrate::NeedMigrate() ? WORLD_COASTS_FILE_NAME : WORLD_COASTS_MIGRATE_FILE_NAME) })
   {
     auto i = localFiles.begin();
     for (; i != localFiles.end(); ++i)
diff --git a/platform/local_country_file_utils.hpp b/platform/local_country_file_utils.hpp
index cee7f88e69..3b5a8c8068 100644
--- a/platform/local_country_file_utils.hpp
+++ b/platform/local_country_file_utils.hpp
@@ -12,6 +12,11 @@ class ModelReader;
 
 namespace platform
 {
+namespace migrate
+{
+  bool NeedMigrate();
+}
+
 // Removes all files downloader creates during downloading of a country.
 void DeleteDownloaderFilesForCountry(CountryFile const & countryFile, int64_t version);
 
diff --git a/platform/platform_android.cpp b/platform/platform_android.cpp
index 239ad36dd5..ad852af6ff 100644
--- a/platform/platform_android.cpp
+++ b/platform/platform_android.cpp
@@ -37,6 +37,7 @@ bool IsResource(string const & file, string const & ext)
   if (ext == DATA_FILE_EXTENSION)
   {
     return (strings::StartsWith(file, WORLD_COASTS_FILE_NAME) ||
+            strings::StartsWith(file, WORLD_COASTS_MIGRATE_FILE_NAME) ||
             strings::StartsWith(file, WORLD_FILE_NAME));
   }
   else if (ext == BOOKMARKS_FILE_EXTENSION ||
diff --git a/storage/storage.cpp b/storage/storage.cpp
index f7d9794f49..eb9d49d2ab 100644
--- a/storage/storage.cpp
+++ b/storage/storage.cpp
@@ -458,10 +458,11 @@ void Storage::LoadCountriesFile(bool forceReload)
   if (m_countries.SiblingsCount() == 0)
   {
     string json;
-    ReaderPtr<Reader>(GetPlatform().GetReader(COUNTRIES_FILE)).ReadAsString(json);
+    string name = migrate::NeedMigrate() ? COUNTRIES_FILE : COUNTRIES_MIGRATE_FILE;
+    ReaderPtr<Reader>(GetPlatform().GetReader(name)).ReadAsString(json);
     m_currentVersion = LoadCountries(json, m_countries);
     if (m_currentVersion < 0)
-      LOG(LERROR, ("Can't load countries file", COUNTRIES_FILE));
+      LOG(LERROR, ("Can't load countries file", name));
   }
 }
 
@@ -691,7 +692,7 @@ void Storage::GetOutdatedCountries(vector<Country const *> & countries) const
     string const name = GetCountryFile(index).GetNameWithoutExt();
     TLocalFilePtr file = GetLatestLocalFile(index);
     if (file && file->GetVersion() != GetCurrentDataVersion() &&
-        name != WORLD_COASTS_FILE_NAME && name != WORLD_FILE_NAME)
+        name != WORLD_COASTS_FILE_NAME && name != WORLD_COASTS_MIGRATE_FILE_NAME && name != WORLD_FILE_NAME)
     {
       countries.push_back(&CountryByIndex(index));
     }