diff --git a/src/onedrive.d b/src/onedrive.d
index 14f96ab3..032aa033 100644
--- a/src/onedrive.d
+++ b/src/onedrive.d
@@ -123,10 +123,14 @@ final class OneDriveApi
 	void downloadById(const(char)[] id, string saveToPath)
 	{
 		checkAccessTokenExpired();
+		import std.file;
 		scope(failure) {
-			import std.file;
 			if (exists(saveToPath)) remove(saveToPath);
 		}
+		// mkdir if need, or File(saveToPath, "wb") may fail
+		if ( !exists(dirName(saveToPath)) ) {
+		   mkdirRecurse(dirName(saveToPath));
+		}
 		const(char)[] url = itemByIdUrl ~ id ~ "/content?AVOverride=1";
 		download(url, saveToPath);
 	}
diff --git a/src/sync.d b/src/sync.d
index 5f12767f..556e65b6 100644
--- a/src/sync.d
+++ b/src/sync.d
@@ -281,8 +281,9 @@ final class SyncEngine
 			break;
 		case ItemType.dir:
 			log.log("Creating directory: ", path);
-			mkdir(path);
-				break;
+			//Use mkdirRecuse to deal nested dir
+			mkdirRecurse(path);
+			break;
 		case ItemType.remote:
 			assert(0);
 		}