Data Recovery Program for USB external hard drive??? HELP ME PLEASE???!!?

Unfortunately a free data recovery software can not recover a large amount of data but if your data is important for you then go for a paid software, i will ask you to use "Kernel for FAT and NTFS" hard disk data recovery software which helped me before in same condition. It is a efficient software which show you up the deleted data in scan mode in RED color, and you have the choice to save all or selective files to desired location.