I know that Electrum is one of the coolest bitcoin wallet out there but I want to be sure of one thing about keeping wallet safe and secured, it's possible to open a new bitcoin wallet using Electrum after installation without online access, I tried this and it worked, my question is if one want to keep the wallet offline this way is it possible?
Before you download and install Electrum, make sure you have reinstalled the device OS. I mean you should make sure you format the device. Remove the WiFi card and Bluetooth.
Like after having your recovery seed and wallet address you remove the wallet while it's offline, no internet connection and whenever you move funds into the wallet you use explorer to check balance, doing this, does it mean it's truly offline?
It is still a paper wallet. You can use a watch-only wallet with it.
https://electrum.readthedocs.io/en/latest/coldstorage.htmlYou can delete the wallet and use a watch-only device to be checking your balance.
If you use a blockchain explorer or watch-only wallet to check the funded address or balance, the wallet is not connected online.
Only what makes your wallet connect online is if you expose or import your seed phrase or private key on online wallet. You will use only master public key for watch-only wallet and it makes it safe for the purpose.