There are no clear criteria for Keystore in the EOS community, only the private key or mnemonic phrase can be backed up when backing up the EOS account.
The EOS account created through the Huobi Wallet can export mnemonic phrases or back up private keys. If it is an imported EOS account, only the private key can be backed up.
Export steps are as follows:
1.Click on any way above to export and enter the security password.
2. Read the notes carefully and click “Confirm”.
3. Write down or copy your private key string on the Export Private Key page.
The EOS account is officially backed up here, so be sure to keep the wallet's mnemonic phrases and private keys safe.