+sg_size_t sg_storage_get_size_free(sg_storage_t st)
+{
+ return st->extension<FileSystemStorageExt>()->getSize() - st->extension<FileSystemStorageExt>()->getUsedSize();
+}
+
+sg_size_t sg_storage_get_size_used(sg_storage_t st)
+{
+ return st->extension<FileSystemStorageExt>()->getUsedSize();
+}
+
+sg_size_t sg_storage_get_size(sg_storage_t st)
+{
+ return st->extension<FileSystemStorageExt>()->getSize();
+}
+