Whole wp site migration

The following deals withe case of migrating wordpress site to existing wordpress site.

1. Back up “.htaccess” and “wp-config.php”.

2. Delete all the directories: namely “wp-admin”, “wp-content”, “wp-includes” and other if any.

3. ftp all the directories. : visit: one warning and one fatal error

4. ftp files in the root directory. : visit: データ確立エラー

5. restore “wp-config.php” from the backup.: visit: nothing appears.

6.restore “.htaccess” from the backup.:visit: nothing appears.

7.