For computer repairs I go to a guy who runs his own computer repair and selling 2nd computers shop. The guy is the one who is in his 40s-50s and has white hair. His junior staff are not as experienced as he is. His shop is in the 2nd level of the 298 Computer Shop in Wanchai and is named Computer Exchange. The number of this should be 2834 2597. Take your HDD to him and if he cannot help you, he can recommend someone he trusts.
I had a external HDD that was dying and on its last legs, his crew helped me transfer all the data to a new HDD. Just a word of caution, one of his better staff is a girl. She may be offended if dirty pics are the first things she sees when gets into the drive. So if you look for the boss then tell him your situation and ask him to personally oversee your recovery. This will save you the embarrassment/red faces should a pic of Maria Ozawa sucking some guy's cock is the 1st file they see when they enter the drive.