archive means a collection of historical documents or records.
its sooo simple.
just open your whatsapp and go to options menu like this
now select option "settings" like this
now select option "chats" like this
now select option "chat history" like this
now select option "ARCHIVE ALL CHATS" like this
now select "OK" to archive all chats like this
now if you want to unarchive all chats.
then select "unarchive all chats" like this
now click OK to unarchive all chats.
thankyou :-)
