Before you start attempt to look and recover any data, you should make raw copy of your drive/partition. You also can perform recovery attempt from the raw copy, rather than the drive/partition itself.

Just in case you found note with combination of alphabet and numbers, you could check https://en.bitcoin.it/wiki/List_of_address_prefixes what hint, information or data you found.


That depends on how the drive formatted. Normally your statement is correct, but not when full format performed, where few tool/software write zeros to whole drive before write the file system (NTFS, etx4, etc.)