If I see balance, etc..... at online wallet, So I have to backup the appdata of online electrum?
I ask this because if i try to restore my seed just from offline wallet there is no funds, no money, any tip about it?
thanks in advance n' best regards!
No you don't have to backup the online wallet. The seed is all you need to restore your wallet. But to see the transactions and balance you need to be online and that is what the watch only wallet is for.
When you say you restore from seed are you doing that on the online system or the offline system? If you are doing it on the offline system you won't see the balance or transactions. But you will see the same addresses as before. Are the addresses the same?
IMO you might want to shelve this plan of using offline wallets for now. It is not something that newbies should be doing. Use online electrum for now and when you become familiar with it you can go for an offline setup. Otherwise the risk is that you make a mistake and loose your coins.