Paper wallet addresses are legacy address, starting from 1. Using P2PKH while importing the wallet as seen on the image you included in your post, but it is worth knowing that if it is not nested segwit and native segwit addresses, if it is just legacy address, the P2PKH prefix is not needed, you can just past only the private key to generate the legacy address for you, I do not know of the future, but it still work that way till now.
Thanks, it's work when I tried.
But, that tool for mnemonic seed, I can't find where to input the private key.
And it's also working for every private key, no matter where it's from, easy to import.
Yes, it works for WIF format, but it didn't work for Hex and Base64 Format, when we have the private key of Hex and Base64 Format, we have to convert it first to WIF format before import to electrum.
Being offline at the time of importing the private key isn't enough.
why?. is that risk also after I move that wallet file from the electrum folder to Flashdisk?
Have you even tried this? Your image shows an online wallet. An offline (cold) Electrum wallet won't show a balance.
Yes, I tried offline on my used address now.
That picture I take while writing this tutorial on the forum.