whatsapp update failure

how can i update my whatsapp,its asking like verify ur google account but ,after all verification google stating that it cant find my account.. the only thing is how can i backup all the data .?

if i uninstall the app whether i will lose all the data, as of now i dont think i have took backup on my datas,since the respective google id which i gave is not working how can i tackle this ?
giri krAsked:
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RaminTechnical AdvisorCommented:
yes Uninstall and reinstall it will solve the problem.

how can i backup all the data ?
 To backup your chats, go to WhatsApp > Menu Button > Settings > Chats > Chat backup > Back Up.

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RaminTechnical AdvisorCommented:
Question was answered.
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