What you are showing on the picture is Base64 encoded binary data.
When decoded – you will have binary data starting with “BIE1”, which confirms that this is an Electrum wallet.
https://github.com/SmartCash/electrum-smart/blob/master/lib/bitcoin.py#L815
This link gives you first steps to decode and decipher Electrum wallet. I made from it program which dumps all JSON data from all wallets from Electrum “wallets” folder.
Obviously you need password to open some of the wallets if they are encrypted.
