Quote from: macwest on November 07, 2017, 03:31:06 AM

I actually mined the bitcoins probably 2 years ago, never used the app . so last week installed an updated version of Bitcoin core and it started re-sync , told me I had no space left so I stopped the process, Went to appdata folder and copied the Bitcoin folder to an external drive. started the app, asked me to show the bitcoin data folder, selected the one in external drive, synced it for a day.

I came in front of it and it was showing me 0.51

I have never spent a bitcoin before

One other option : I had 0.51 bitcoin and I had this crazy idea that I had 0.98 coins. Feels like I'm 100 percent sure but people sometimes make themselves believe unreal stuff over time.

If someone says, it is not possible losing coins during sync, I'll probably accept I'm tripping.

Thanks a lot for help

Why not print out the transaction register or export it to Excel, and check if at some moment in time you had 0.98 bitcoin. Then after that, there would have to be transactions that reduced it to 0.51.

Another method, you say you mined the coins, was it with a group like Slush? Logon and download from then an activity history.