My samsung M3 external HDD is corrupted how to recover data

Raiden599

Commendable
Jun 7, 2016
5
0
1,510
Some days before my samsung M3 portable hard disk got corrupted....whenever i plug it in my PC or any other PC its says some files are missing and says to format the disk....i can't format it cuz it has 730gb+ official data which will be lost...help me how can i recover them...i can't afford much money to spend:/
 

Raiden599

Commendable
Jun 7, 2016
5
0
1,510
I tried using Easeus but it charges $80 for full version and in free version i can only recover 1gb.....i need a software by which i can recover whole data without pur hasing that software
 

Raiden599

Commendable
Jun 7, 2016
5
0
1,510
I didn't delete any files.....all the files are intact in my ext. HDD...but it is corrupted and when connecting to PC it says to format it......which i don't want to.....any idea on how to recover?