I mined bitcoin early in 2009 and found a few blocks, at the time it was worth nothing and was a novelty more or less. I believe this was before the first bitcoin pizza purchase. I left the wallet.dat on the hard drive without backing it up.Now the exciting part! I still have the hard drive. I save all my old computers and they have all the original drives in them.I always thought about that early wallet.dat file and that if the price of BTC went high enough I would recover it. I think I may have written over the windows partition on the drive so this is a bet that I can even recover the files. As a trial run I formatted a SD card and ran TestDisk on it to see if I could recover the files and how the software worked.I have been really concerned I would mess the drive up or if I send the drive somewhere the bitcoin could be stolen without my knowledge or I could actually even be robbed. Early bitcoin blocks were 50 BTC each so theoretically if I can get the file it may have a significant amount accessible.Currently I am leaning toward having a professional company go over the drive and be there in person for the process. The cost for the recovery isn't a huge deal since I have invested in Bitcoin for years and have the profits from that to pay for recovery.Any advice on what you would do in this situation or finding a reputable data recovery in the US would be great!