If you have the HD seed you should be able to recover the wallet by importing it into supported wallets like Electrum but how did you get the HD seed? Since BitcoinQT/Bitcoin core doesn't generate a seed I'm sure it was not from this wallet.

About simple backup you don't need to activate anything, If you talking about Bitcoin core then copying the wallet.dat file is enough but make sure you turn Bitcoin core and Bitcoind off because if you copy the wallet.dat file while these two are running there is a big chance that the backup wallet you just made may become corrupted. So make sure to close them properly before making a backup.

I don't understand this part below I think it would be better if you create a thread in your local language or use a translator like Google translator.