SW utilities to check WD Elements portable disk drive

Hi, I’d like to check the correct functioning of my WD Elements 1Tb external disk drive, since it doesn’t save the data as it used to do sometime ago. I can’t see any sign of external damage, and the drive is visible from the Windows Explorer. I did recently a reformatting, but only managed to do a quick format using the format utility provided by windows 8.1 because the long formatting was taking ages to complete, only 2% every few hours. So I’d like to check the integrity of the disk and wonder if there are any utilities provided by WD to do this. I downloaded the WDDriveUtilities but apparently they don’t detect my disk drive.
Any help appreciated



Data Lifeguard Diagnostic for Windows