The Yahoo mail folders can be easily moved from Yahoo to Gmail account through the following steps:
Firstly copy all the messages that are required to migrate.
Now, tap on the settings gear option.
Then, select settings menu that comes in the next.
Now, go the account and click on the import option.
Then, enter your Yahoo Id.
Tap on continue to proceed further.
More help visit: Yahoo live chat
Yahoo Toll-Free Number
+888-815-6317(US/CA)
+44-800-051-3717 (UK)
+61-180-082-5192 (AUS)