https://www.blockchain.com/explorer/addresses/btc/1CASsBYhRAFrJkQXzw8E2di7vP6FhQyEpC?page=1
The question is, I know I was using an old Samsung phone and the Schildbach wallet, this was so early on that I still have emails from where I was asking him asking for pin unlock because I thought it was insecure!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
This app used to like to backup the keys to a file called bitcoin-wallet-keys-xxx-xx-xx (xxx being the date)
The thing is I cannot locate this backup, but I do have the phone, does anyone here know of any good software to scan the phone with, the phone was wiped at some point so needs to be pretty low level kinda stuff...
Any hope of doing this or am I wasting my time?
No, you are not wasting your time. That is a lot of money and you should not give up on it so easily. Unless you are rich and it's peanuts to you.
If I were in your shoes, I would probably take the phone to an expert on data recovery. I am sure there is still a way to get the data back. But you should make sure that they cannot just take your money because you have sensitive data on there. Take somebody with you as a witness and tell the expert all about it. Let him acknowledge that info and accept your request.